Толковый словарь английского языка - ass

I. noun Etymology: Middle English, from Old English ~a, probably from Old Irish asan, from Latin asinus Date: before 12th century any of several hardy gregarious African or Asian perissodactyl mammals (genus Equus) smaller than the horse and having long ears, a stupid, obstinate, or perverse person , II. noun or arse Etymology: Middle English ars, ers, from Old English ærs, ears; akin to Old High German & Old Norse ars buttocks, Greek orrhos buttocks, oura tail Date: before 12th century 1. buttocks, anus, sexual intercourse, III. adverb Etymology: 2~ Date: circa 1920 often vulgar — used as a postpositive intensive especially with words of derogatory implication