retirement (n.)youdaoicibaDictYouDict[retirement 词源字典]
1590s, "act of retreating," also "act of withdrawing into seclusion," from Middle French retirement (1570s); see retire + -ment. Meaning "privacy" is from c. 1600; that of "withdrawal from occupation or business" is from 1640s.[retirement etymology, retirement origin, 英语词源]