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convivial (adj.)[convivial 词源字典]: 1660s, "pertaining to a feast," from Late Latin convivialis, from Latin convivium "a feast," from convivere "to carouse together," from com- "together" (see com-) + vivere "to live" (see vital). Meaning "sociable" is from 18c. Related: Conviviality.[convivial etymology, convivial origin, 英语词源]