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convivial (adj.)

1660s, "pertaining to or of the nature of a feast," from Late Latin convivialis "pertaining to a feast," from Latin convivium "a feast," from convivere "to carouse together, live together," from assimilated form of com "with, together" (see con-) + vivere "to live" (from PIE root *gwei- "to live"). Meaning "sociable" is from 18c. Related: Convivially; conviviality.