uncouthyoudaoicibaDictYouDict[uncouth 词源字典]
uncouth: [OE] Uncouth originally meant ‘unknown’ or ‘unfamiliar’ – a sense which survived into the 17th century (‘Now the whole superficies of the earth as well uncouth as discovered, is but a little point’, John Boys, Works 1616). ‘Crude, awkward’ is a secondary development, first recorded in the 16th century. The word was formed in the prehistoric Germanic period from the prefix un- ‘not’ and the past participle of *kunnan ‘know’ (whose closest living English relative is could).
=> could[uncouth etymology, uncouth origin, 英语词源]
uncouth (adj.)youdaoicibaDictYouDict
Old English uncuð "unknown, strange, unusual; uncertain, unfamiliar; unfriendly, unkind, rough," from un- (1) "not" + cuð "known, well-known," past participle of cunnan "to know" (see can (v.1)). Meaning "strange, crude, clumsy" is first recorded 1510s. The compound (and the thing it describes) widespread in IE languages, such as Latin ignorantem, Old Norse ukuðr, Gothic unkunþs, Sanskrit ajnatah, Armenian ancanaut', Greek agnotos, Old Irish ingnad "unknown."