Strong G1163δεῖ
be necessary
- Transliteration
- dei
- Pronunciation
- die deh-on'
- Morphology
- Greek Verb
Definition
Third person singular active present of G1210; also δεόν deon which is neuter active participle of the same; both used impersonally;
it is (was etc.) necessary (as binding): - behoved be meet must (needs) (be) need (-ful) ought should.
it is (was etc.) necessary (as binding): - behoved be meet must (needs) (be) need (-ful) ought should.
Detailed definition
δεῖ impersonal (δέω),
[in LXX chiefly for infin. with לְ;]
one must, it is necessary: with inf., Mat.26:54, Mrk.13:7, Act.5:29, al.; with accusative and inf., Mat.16:21, Mrk.8:31, Jhn.3:7, Act.25:10, al.; with ellipse of accusative, Mat.23:23; of accusative, and inf., Mrk.13:14, Rom.1:27 8:26; οὐ (μὴ) δεῖ (non licet), ought not, must not: Act.25:24, 2Ti.2:24; impf., ἔδει, of necessity or obligation in past time regarding a past event (Bl., § 63, 4), Mat.18:33, Luk.15:32, Jhn.4:4, Act.27:21, al.; periphr., δέον ἐστίν (as in Attic, χρεών ἐστι = χρή, see: δέον), Act.19:36; id., with ellipse of ἐστίν, 1Pe.1:6 τὰ μὴ δέοντα (= ἃ οὐ δεῖ 1Ti.5:13.
SYN.: ὀφείλει, expressing moral obligation, as distinct from δεῖ, denoting logical necessity and χρή, a need which results from the fitness of things (see Tr., Syn., § cvii, 10; Westc. on Heb.2:1, 1Jn.2:6; Hort on Jas.3:10). (AS)
[in LXX chiefly for infin. with לְ;]
one must, it is necessary: with inf., Mat.26:54, Mrk.13:7, Act.5:29, al.; with accusative and inf., Mat.16:21, Mrk.8:31, Jhn.3:7, Act.25:10, al.; with ellipse of accusative, Mat.23:23; of accusative, and inf., Mrk.13:14, Rom.1:27 8:26; οὐ (μὴ) δεῖ (non licet), ought not, must not: Act.25:24, 2Ti.2:24; impf., ἔδει, of necessity or obligation in past time regarding a past event (Bl., § 63, 4), Mat.18:33, Luk.15:32, Jhn.4:4, Act.27:21, al.; periphr., δέον ἐστίν (as in Attic, χρεών ἐστι = χρή, see: δέον), Act.19:36; id., with ellipse of ἐστίν, 1Pe.1:6 τὰ μὴ δέοντα (= ἃ οὐ δεῖ 1Ti.5:13.
SYN.: ὀφείλει, expressing moral obligation, as distinct from δεῖ, denoting logical necessity and χρή, a need which results from the fitness of things (see Tr., Syn., § cvii, 10; Westc. on Heb.2:1, 1Jn.2:6; Hort on Jas.3:10). (AS)
In the Bible
Strong G1163 appears in 104 verses of the KJV.
Translated in the KJV by
- must55
- ought29
- need6
- be4
- should3
- meet2
- oughtest2
- behove1
- shouldest1
- thou1
First verses
- Matthew 16:21From that time forth began Jesus to shew unto his disciples, how that he must go unto Jerusalem, and suffer many things of the elders and chief priests and scribes, and be killed, and be raised again the third day.
- Matthew 17:10And his disciples asked him, saying, Why then say the scribes that Elias must first come?
- Matthew 18:33Shouldest not thou also have had compassion on thy fellowservant, even as I had pity on thee?
- Matthew 23:23Woe unto you, scribes and Pharisees, hypocrites! for ye pay tithe of mint and anise and cummin, and have omitted the weightier matters of the law, judgment, mercy, and faith: these ought ye to have done, and not to leave the other undone.
- Matthew 24:6And ye shall hear of wars and rumours of wars: see that ye be not troubled: for all these things must come to pass, but the end is not yet.
- Matthew 25:27Thou oughtest therefore to have put my money to the exchangers, and then at my coming I should have received mine own with usury.
- Matthew 26:35Peter said unto him, Though I should die with thee, yet will I not deny thee. Likewise also said all the disciples.
- Matthew 26:54But how then shall the scriptures be fulfilled, that thus it must be?
- Mark 8:31And he began to teach them, that the Son of man must suffer many things, and be rejected of the elders, and of the chief priests, and scribes, and be killed, and after three days rise again.
- Mark 9:11And they asked him, saying, Why say the scribes that Elias must first come?
- Mark 13:7And when ye shall hear of wars and rumours of wars, be ye not troubled: for such things must needs be; but the end shall not be yet.
- Mark 13:10And the gospel must first be published among all nations.
- Mark 13:14But when ye shall see the abomination of desolation, spoken of by Daniel the prophet, standing where it ought not, (let him that readeth understand,) then let them that be in Judea flee to the mountains:
- Mark 14:31But he spake the more vehemently, If I should die with thee, I will not deny thee in any wise. Likewise also said they all.
- Luke 2:49And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father’s business?
- Luke 4:43And he said unto them, I must preach the kingdom of God to other cities also: for therefore am I sent.
- Luke 9:22Saying, The Son of man must suffer many things, and be rejected of the elders and chief priests and scribes, and be slain, and be raised the third day.
- Luke 11:42But woe unto you, Pharisees! for ye tithe mint and rue and all manner of herbs, and pass over judgment and the love of God: these ought ye to have done, and not to leave the other undone.
- Luke 12:12For the Holy Ghost shall teach you in the same hour what ye ought to say.
- Luke 13:14And the ruler of the synagogue answered with indignation, because that Jesus had healed on the sabbath day, and said unto the people, There are six days in which men ought to work: in them therefore come and be healed, and not on the sabbath day.
Occurrences by book
Detailed Greek dictionary
δεῖ:
subjunctive δέη, sometimes contraction δῆ (in codices of Comedy texts, as [Refs 5th c.BC+ (5th-6th c.BC: Aristophanes Comicus “Ranae” 265))]; ὁπόσου κα δῆ [Refs 5th c.BC+ (“IG” 4.1484.65 (Epid.), compare “SIG” 245 G 47 (Delph.); _optative_ δέοι 5th c.BC: Thucydides Historicus 4.4)]; infinitive δεῖ; participle δέον (see. infr. IV): imperfect ἔδει, Ionic dialect ἔδεε: future δεήσει [Refs 5th c.BC+ (5th c.BC: Euripides Tragicus “Hippolytus” 941, etc.)]: aorist I ἐδέησε [Refs 5th c.BC+ (5th c.BC: Thucydides Historicus 2.77, etc.)] —Impers. from δέω (A), there is need (the sense of moral obligation, properly belonging to χρή, is later, [Refs 5th c.BC+ (5th c.BC: Sophocles Tragicus “Philoctetes” 583, etc.):)]
I c.accusative person et infinitive, it is needful for one to do, one must, once in [Refs 8th c.BC+ (8th c.BC: Homerus Epicus, τί δὲ δεῖ πολεμιζέμεναι.. Ἀργείους)] why need the Argives fight? [Refs 8th c.BC+ (8th c.BC: Ilias Homerus Epicus “Illiad” 9.337; δ. [μ᾽] ἐλθεῖν 5th c.BC: Pindarus Lyricus “O.” 6.28, etc.)]: with nominative of the pronoun, ἡγούμην.. δεῖν.. μεγαλοψυχότερος φαίνεσθαι [Refs 5th c.BC+ (4th c.BC: Demosthenes Orator 19.235: rarely δεῖ σ᾽ ὅπως δείξεις, ={δεῖ σε δεῖξαι}, 5th c.BC: Sophocles Tragicus “Ajax” 556, compare “Ph.” 54; δεῖ σ᾽ ὅπως μηδὲν διοίσεις 5th c.BC: Cratinus Comicus 108; (the full _construction_ in 5th c.BC: Sophocles Tragicus “Philoctetes” 77 τοῦτο δεῖ σοφισθῆναι.. ὅπως γενήσῃ))]: rarely with dative person, there is need of.. for.., θεοῖσι προσβαλεῖν χθονὶ ἄλλην δεήσει γαῖαν [Refs 5th c.BC+ (5th c.BC: Euripides Tragicus “Hippolytus” 941, compare 5th-6th c.BC: Xenophon Historicus “Anabasis” 3.4.35, “Oec.” 7.20: the _accusative_ _person_ is often omitted, ἐκ τῶν μανθάνειν δεῖ (i.e. ἡμᾶς) 5th c.BC: Herodotus Historicus 1.8, compare 4th-5th c.BC: Aeschylus Tragicus “Agamemnon” 567, “Eu.” 826, etc.)]
I.2 with accusative of things et infinitive, δεῖ τι γενέσθαι [Refs 5th c.BC+ (5th c.BC: Thucydides Historicus 5.26; παραδείγματα, καθ᾽ ἃ δέοι ἀποκρίνεσθαι 5th-6th c.BC: Plato Philosophus “Meno” 79a, etc.)]; also ἐπεὶ δέ οἱ ἔδεε κακῶς γενέσθαι since it was fated for him.., since he was doomed.., [Refs 5th c.BC+ (5th c.BC: Herodotus Historicus 2.161, compare 8.53, 9.109, 5th c.BC: Sophocles Tragicus “Oedipus Tyrannus” 825)]; for οἴομαι δεῖν, see at {οἴομαι}.
I.3 absolutely with infinitive understood, μὴ πεῖθ᾽ ἃ μὴ δεῖ (i.e. πείθειν) [Refs 5th c.BC+ (5th c.BC: Sophocles Tragicus “Oedipus Coloneus” 1442, compare “OT” 1273)]; εἴ τι δέοι, ἤν τι δέῃ (i.e. γενέσθαι), [Refs 5th c.BC+ (5th-6th c.BC: Xenophon Historicus “Memorabilia” 1.2.59, 5th c.BC: Thucydides Historicus 1.44)]; κἂν δέῃ (i.e. τροχάζειν), τροχάζῶ [Refs 6th c.BC+ ({5-6th c.BC}: Philetaerus Comicus 3.)]
II with genitive of things, there is need of, frequently with negative, οὐδὲν ἂν δέοι πολλοῦ ἀργυρίου [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Crito” 45a, etc.; τί δεῖ τῆς ἀρετῆ; 4th c.BC: Aristoteles Philosophus “Politica” 1309b10)]; sometimes with infinitive added, μακροῦ λόγου δεῖ ταῦτ᾽ ἐπεξελθεῖν [Refs 4th c.BC+ (4th-5th c.BC: Aeschylus Tragicus “Prometheus Vinctus” 870, compare 875, “Supp.” 407.)]
II.b frequently in phrases, πολλοῦ δεῖ there wants much, far from it, ὀλίγου δεῖ there wants little, all but; in full with infinitive, πολλοῦ δεῖ οὕτως ἔχειν [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Apologia” 35d; τοὺς Πλαταιέας ἐλαχίστου ἐδέησε διαφθεῖραι [τὸ πῦρ] 5th c.BC: Thucydides Historicus 2.77; πολλοῦ γε δεῖ, πολλοῦ γε καὶ δεῖ 5th-6th c.BC: Aristophanes Comicus “Acharnenses” 543, 4th c.BC: Demosthenes Orator 18.300, 21.71)]; τοῦ πλεῦνος αἰεὶ ἔδεε there was always further to travel, [Refs 5th c.BC+ (5th c.BC: Herodotus Historicus 4.43; τοῦ παντὸς δεῖ 2nd c.AD: Lucianus Sophista “Merc.Cond.” 13: also ὀλίγου δεῖν)] absolutely, in same sense, [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Apologia” 22a, etc.; μικροῦ δεῖν 4th c.BC: Demosthenes Orator 27.29.)]
II.2 with dative person added, δεῖ μοί τινος [Refs 5th c.BC+ (4th-5th c.BC: Aeschylus Tragicus “Agamemnon” 848, 5th c.BC: Euripides Tragicus “Medea” 565, 5th c.BC: Thucydides Historicus 1.71, etc.)]
II.3 with accusative person added, αὐτὸν γάρ σε δεῖ προμηθέως [Refs 5th c.BC+ (4th-5th c.BC: Aeschylus Tragicus “Prometheus Vinctus” 86, compare 5th c.BC: Euripides Tragicus “Rhesus” 837, “Hipp.” 23.)]
II.4 rarely with Subj. in nominative, δεῖ μοί τι something is needful to me, ἓν δεῖ μόνον μοι [Refs 5th c.BC+ (5th c.BC: Euripides Tragicus “Supplices” 594; εἴ τι δέοι τῷ χορῷ 5th c.BC: Antipho Orator 6.12; πρῶτον μὲν τοῦτο δεῖ, ὑπειληφέναι.. 4th c.BC: Demosthenes Orator 10.15.)]
III middle, δεῖται there is need, with genitive, δεῖταί σοι τῆς αὐτῆς ἐρωτήσεως [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Meno” 79c; ὅσων δέοιτο 4th c.BC: Aeneas Tacticus 13.1; ἑτέρου δεῖσθαι στρατηγοῦ νομίζων 1st-2nd c.AD: Plutarchus Biographus et Philosophus “Pelopidas” 26)]: with infinitive, ὥστε βραχἔ ἐμοὶ δεῖσθαι φράσαι [Refs 5th c.BC+ (5th c.BC: Sophocles Tragicus “Oedipus Coloneus” 570 (codices); δεήσεται.. ἀναγράφεσθαι 4th c.BC: Aeneas Tacticus 31.9; τήν μευ γλῶσσαν ἐκτεμεῖν δεῖται 3rd c.BC: Herodas Mimographus 6.41.)]
IV neuter participle δέον (δεῖν is uncertain in [Refs 5th c.BC+ (5th-6th c.BC: Aristophanes Comicus “Fragmenta” 220, 5th c.BC: Lysias Orator 14.7, compare 2nd c.AD: Apollonius Dyscolus Grammaticus “de Adverbiis;” 132.30, Hdn.Gr. 2.328, +others, 5th c.AD(?): Hesychius Legal icographus))]: absolutely, it being needful or fitting, [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Protagoras” 355d, etc.)]; οὐκ ἀπήντα, δέον, he did not appear in court, though he ought to have done so, [Refs 4th c.BC+ (4th c.BC: Demosthenes Orator 21.90)]: with infinitive, [Refs 5th c.BC+ (5th-6th c.BC: Aristophanes Comicus “Nubes” 988)]; οὐδὲν δέον there being no need, [Refs 5th c.BC+ (5th c.BC: Herodotus Historicus 3.65, etc.)]: future ὡς αὐτίκα δεῆσον διώκειν [Refs 5th c.BC+ (5th-6th c.BC: Xenophon Historicus “Institutio Cyri (Cyropaedia)” 3.2.8)]: aorist δεῆσαν [Refs 2nd c.BC+ (1st-2nd c.AD: Plutarchus Biographus et Philosophus “Fabius Maximus” 9, etc.: also δέον ἂν εἴη, ={δέοι ἄν}, 2nd c.BC: Polybius Historicus 2.37.5, etc.: less frequently _genitive_ _absolutely_ δέοντος,)] with accusative infinitive, [Refs 1st c.AD+ (1st c.AD: Cornutus Philosophus “de Natura Deorum” 17.)]
IV.2 substantive δέον, τό (see entry vocative).
subjunctive δέη, sometimes contraction δῆ (in codices of Comedy texts, as [Refs 5th c.BC+ (5th-6th c.BC: Aristophanes Comicus “Ranae” 265))]; ὁπόσου κα δῆ [Refs 5th c.BC+ (“IG” 4.1484.65 (Epid.), compare “SIG” 245 G 47 (Delph.); _optative_ δέοι 5th c.BC: Thucydides Historicus 4.4)]; infinitive δεῖ; participle δέον (see. infr. IV): imperfect ἔδει, Ionic dialect ἔδεε: future δεήσει [Refs 5th c.BC+ (5th c.BC: Euripides Tragicus “Hippolytus” 941, etc.)]: aorist I ἐδέησε [Refs 5th c.BC+ (5th c.BC: Thucydides Historicus 2.77, etc.)] —Impers. from δέω (A), there is need (the sense of moral obligation, properly belonging to χρή, is later, [Refs 5th c.BC+ (5th c.BC: Sophocles Tragicus “Philoctetes” 583, etc.):)]
I c.accusative person et infinitive, it is needful for one to do, one must, once in [Refs 8th c.BC+ (8th c.BC: Homerus Epicus, τί δὲ δεῖ πολεμιζέμεναι.. Ἀργείους)] why need the Argives fight? [Refs 8th c.BC+ (8th c.BC: Ilias Homerus Epicus “Illiad” 9.337; δ. [μ᾽] ἐλθεῖν 5th c.BC: Pindarus Lyricus “O.” 6.28, etc.)]: with nominative of the pronoun, ἡγούμην.. δεῖν.. μεγαλοψυχότερος φαίνεσθαι [Refs 5th c.BC+ (4th c.BC: Demosthenes Orator 19.235: rarely δεῖ σ᾽ ὅπως δείξεις, ={δεῖ σε δεῖξαι}, 5th c.BC: Sophocles Tragicus “Ajax” 556, compare “Ph.” 54; δεῖ σ᾽ ὅπως μηδὲν διοίσεις 5th c.BC: Cratinus Comicus 108; (the full _construction_ in 5th c.BC: Sophocles Tragicus “Philoctetes” 77 τοῦτο δεῖ σοφισθῆναι.. ὅπως γενήσῃ))]: rarely with dative person, there is need of.. for.., θεοῖσι προσβαλεῖν χθονὶ ἄλλην δεήσει γαῖαν [Refs 5th c.BC+ (5th c.BC: Euripides Tragicus “Hippolytus” 941, compare 5th-6th c.BC: Xenophon Historicus “Anabasis” 3.4.35, “Oec.” 7.20: the _accusative_ _person_ is often omitted, ἐκ τῶν μανθάνειν δεῖ (i.e. ἡμᾶς) 5th c.BC: Herodotus Historicus 1.8, compare 4th-5th c.BC: Aeschylus Tragicus “Agamemnon” 567, “Eu.” 826, etc.)]
I.2 with accusative of things et infinitive, δεῖ τι γενέσθαι [Refs 5th c.BC+ (5th c.BC: Thucydides Historicus 5.26; παραδείγματα, καθ᾽ ἃ δέοι ἀποκρίνεσθαι 5th-6th c.BC: Plato Philosophus “Meno” 79a, etc.)]; also ἐπεὶ δέ οἱ ἔδεε κακῶς γενέσθαι since it was fated for him.., since he was doomed.., [Refs 5th c.BC+ (5th c.BC: Herodotus Historicus 2.161, compare 8.53, 9.109, 5th c.BC: Sophocles Tragicus “Oedipus Tyrannus” 825)]; for οἴομαι δεῖν, see at {οἴομαι}.
I.3 absolutely with infinitive understood, μὴ πεῖθ᾽ ἃ μὴ δεῖ (i.e. πείθειν) [Refs 5th c.BC+ (5th c.BC: Sophocles Tragicus “Oedipus Coloneus” 1442, compare “OT” 1273)]; εἴ τι δέοι, ἤν τι δέῃ (i.e. γενέσθαι), [Refs 5th c.BC+ (5th-6th c.BC: Xenophon Historicus “Memorabilia” 1.2.59, 5th c.BC: Thucydides Historicus 1.44)]; κἂν δέῃ (i.e. τροχάζειν), τροχάζῶ [Refs 6th c.BC+ ({5-6th c.BC}: Philetaerus Comicus 3.)]
II with genitive of things, there is need of, frequently with negative, οὐδὲν ἂν δέοι πολλοῦ ἀργυρίου [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Crito” 45a, etc.; τί δεῖ τῆς ἀρετῆ; 4th c.BC: Aristoteles Philosophus “Politica” 1309b10)]; sometimes with infinitive added, μακροῦ λόγου δεῖ ταῦτ᾽ ἐπεξελθεῖν [Refs 4th c.BC+ (4th-5th c.BC: Aeschylus Tragicus “Prometheus Vinctus” 870, compare 875, “Supp.” 407.)]
II.b frequently in phrases, πολλοῦ δεῖ there wants much, far from it, ὀλίγου δεῖ there wants little, all but; in full with infinitive, πολλοῦ δεῖ οὕτως ἔχειν [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Apologia” 35d; τοὺς Πλαταιέας ἐλαχίστου ἐδέησε διαφθεῖραι [τὸ πῦρ] 5th c.BC: Thucydides Historicus 2.77; πολλοῦ γε δεῖ, πολλοῦ γε καὶ δεῖ 5th-6th c.BC: Aristophanes Comicus “Acharnenses” 543, 4th c.BC: Demosthenes Orator 18.300, 21.71)]; τοῦ πλεῦνος αἰεὶ ἔδεε there was always further to travel, [Refs 5th c.BC+ (5th c.BC: Herodotus Historicus 4.43; τοῦ παντὸς δεῖ 2nd c.AD: Lucianus Sophista “Merc.Cond.” 13: also ὀλίγου δεῖν)] absolutely, in same sense, [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Apologia” 22a, etc.; μικροῦ δεῖν 4th c.BC: Demosthenes Orator 27.29.)]
II.2 with dative person added, δεῖ μοί τινος [Refs 5th c.BC+ (4th-5th c.BC: Aeschylus Tragicus “Agamemnon” 848, 5th c.BC: Euripides Tragicus “Medea” 565, 5th c.BC: Thucydides Historicus 1.71, etc.)]
II.3 with accusative person added, αὐτὸν γάρ σε δεῖ προμηθέως [Refs 5th c.BC+ (4th-5th c.BC: Aeschylus Tragicus “Prometheus Vinctus” 86, compare 5th c.BC: Euripides Tragicus “Rhesus” 837, “Hipp.” 23.)]
II.4 rarely with Subj. in nominative, δεῖ μοί τι something is needful to me, ἓν δεῖ μόνον μοι [Refs 5th c.BC+ (5th c.BC: Euripides Tragicus “Supplices” 594; εἴ τι δέοι τῷ χορῷ 5th c.BC: Antipho Orator 6.12; πρῶτον μὲν τοῦτο δεῖ, ὑπειληφέναι.. 4th c.BC: Demosthenes Orator 10.15.)]
III middle, δεῖται there is need, with genitive, δεῖταί σοι τῆς αὐτῆς ἐρωτήσεως [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Meno” 79c; ὅσων δέοιτο 4th c.BC: Aeneas Tacticus 13.1; ἑτέρου δεῖσθαι στρατηγοῦ νομίζων 1st-2nd c.AD: Plutarchus Biographus et Philosophus “Pelopidas” 26)]: with infinitive, ὥστε βραχἔ ἐμοὶ δεῖσθαι φράσαι [Refs 5th c.BC+ (5th c.BC: Sophocles Tragicus “Oedipus Coloneus” 570 (codices); δεήσεται.. ἀναγράφεσθαι 4th c.BC: Aeneas Tacticus 31.9; τήν μευ γλῶσσαν ἐκτεμεῖν δεῖται 3rd c.BC: Herodas Mimographus 6.41.)]
IV neuter participle δέον (δεῖν is uncertain in [Refs 5th c.BC+ (5th-6th c.BC: Aristophanes Comicus “Fragmenta” 220, 5th c.BC: Lysias Orator 14.7, compare 2nd c.AD: Apollonius Dyscolus Grammaticus “de Adverbiis;” 132.30, Hdn.Gr. 2.328, +others, 5th c.AD(?): Hesychius Legal icographus))]: absolutely, it being needful or fitting, [Refs 5th c.BC+ (5th-6th c.BC: Plato Philosophus “Protagoras” 355d, etc.)]; οὐκ ἀπήντα, δέον, he did not appear in court, though he ought to have done so, [Refs 4th c.BC+ (4th c.BC: Demosthenes Orator 21.90)]: with infinitive, [Refs 5th c.BC+ (5th-6th c.BC: Aristophanes Comicus “Nubes” 988)]; οὐδὲν δέον there being no need, [Refs 5th c.BC+ (5th c.BC: Herodotus Historicus 3.65, etc.)]: future ὡς αὐτίκα δεῆσον διώκειν [Refs 5th c.BC+ (5th-6th c.BC: Xenophon Historicus “Institutio Cyri (Cyropaedia)” 3.2.8)]: aorist δεῆσαν [Refs 2nd c.BC+ (1st-2nd c.AD: Plutarchus Biographus et Philosophus “Fabius Maximus” 9, etc.: also δέον ἂν εἴη, ={δέοι ἄν}, 2nd c.BC: Polybius Historicus 2.37.5, etc.: less frequently _genitive_ _absolutely_ δέοντος,)] with accusative infinitive, [Refs 1st c.AD+ (1st c.AD: Cornutus Philosophus “de Natura Deorum” 17.)]
IV.2 substantive δέον, τό (see entry vocative).