Strong G4920 συνίημι suniēmi · to understand

Luke

1. Luke 2:50
   And they understood not the saying which he spake unto them.
2. Luke 8:10
   And he said, Unto you it is given to know the mysteries of the kingdom of God: but to others in parables; that seeing they might not see, and hearing they might not understand.
3. Luke 18:34
   And they understood none of these things: and this saying was hid from them, neither knew they the things which were spoken.
4. Luke 24:45
   Then opened he their understanding, that they might understand the scriptures,