apologetic (adj.)youdaoicibaDictYouDict[apologetic 词源字典]
1640s, "vindicatory," from French apologétique, from Latin apologeticus, from Greek apologetikos "defensible," from apologeisthai (see apology). Meaning "regretfully acknowledging failure" is from 1855. As a noun, "formal defense," from early 15c. Related: Apologetics (c. 1753).[apologetic etymology, apologetic origin, 英语词源]