- autumn
- autumn (n.) late 14c., autumpne (modern form from 16c.), from O.Fr. autumpne, automne (13c.), from L. autumnus (also auctumnus, perhaps influenced by auctus "increase"), of unknown origin. Perhaps from Etruscan, but Tucker suggests a meaning "drying-up season" and a root in *auq- (which would suggest the form in -c- was the original) and compares archaic English sere-month "August."Harvest was the English name for the season until autumn began to displace it 16c. In Britain, the season is popularly August through October; in U.S., September through November. Cf. It. autunno, Sp. otoño, Port. outono, all from the Latin word. Unlike the other three seasons, its names across the IE languages leave no evidence that there ever was a common word for it.Many "autumn" words mean "end, end of summer," or "harvest." Cf. also Lith. ruduo "autumn," from rudas "reddish," in reference to leaves; O.Ir. fogamar, lit. "under-winter."
Etymology dictionary. 2014.