apology Look up apology at Dictionary.com
1530s, "defense, justification," from L.L. apologia, from Gk. apologia "a speech in defense," from apologeisthai "to speak in one's defense," from apologos "an account, story," from apo- "from, off" (see apo-) + logos "speech." The original English sense of "self-justification" yielded a meaning "frank expression of regret for wrong done," first recorded 1590s, but it was not the main sense until 18c. The old sense tends to emerge in Latin form apologia (first attested 1784), especially since J.H. Newman's "Apologia pro Vita Sua" (1864).