- congratulation (n.)
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[congratulation 词源字典] - mid-15c., from Latin congratulationem (nominative congratulatio), noun of action from past participle stem of congratulari "wish joy," from com- "together, with" (see com-) + gratulari "give thanks, show joy," from gratus "agreeable" (see grace (n.)).[congratulation etymology, congratulation origin, 英语词源]