XXre-form (yacar): The word in the Revised Version (British and American) is found only in Lev 26:23, in the phrase "ye will not be reformed." The meaning is, "to be instructed," or, more fully, "to let ones self be chastened," i.e. by Gods discipline to learn the lessons of this chastening.
The Hebrew word is the same in a similar connection in Jer 6:8, where it is rendered, "Be thou instructed," and in Jer 31:18, "I was chastised." Ps 2:10 ("instructed"); Prov 29:19 ("corrected") use the Hebrew term of admonition by the words of man.
The King James Version also has "reform" in 2 Esdras 8:12; The Wisdom of Solomon 9:18.