early 14c., from Old French benigne "kind, benign, merciful, gracious" (12c., Modern French bénin, fem. bénigne), from Latin benignus "kindly, kindhearted, friendly, generous," literally "well born," from bene "well" (see bene-) + gignere "to bear, beget," from genus "birth" (from PIE root *gene- "give birth, beget"). For similar sense evolution, compare gentle, kind (adj.), generous. Related: Benignly.
