decency (n.)youdaoicibaDictYouDict[decency 词源字典]
1560s, "appropriateness," from Latin decentia "comeliness, decency," from decentem "becoming, fitting" (see decent). Meaning "modesty" (i.e. "appropriateness to standards of society") is from 1630s.[decency etymology, decency origin, 英语词源]