- congratulation (n.)
- 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.)).
- congratulations
- 1630s, an exclamation conveying a sentiment of congratulation, from congratulation (q.v.).
- self-congratulation (n.)
- 1630s, from self- + congratulation.