Backslider
Easton’s Bible Dictionary & Webster’s 1828 Dictionary · Matthew George Easton, Noah Webster
Backslider - (Webster's 1828 Dictionary)
BACKSLI'DER, n. An apostate; one who falls from the faith and practice of religion. Prov 14.
2. One who neglects his vows of obedience and falls into sin.
Source of the article
Matthew George Easton, Easton’s Bible Dictionary; Noah Webster, American Dictionary of the English Language (1828)
Bible Strong combined digital edition