Unfaithful
来自Big Physics
Safin（讨论 | 贡献）2022年4月28日 (四) 05:45的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/unfaithful ref] From un- + faithful == etymonline == [https://www.etymonline.com/w…”的新页面）
wiktionary
From un- + faithful
etymonline
unfaithful (adj.)
mid-14c., "acting falsely," from un- (1) "not" + faithful. In Middle English it also had a sense of "infidel, unbelieving, irreligious" (late 14c.). Sense of "not faithful in marriage" is attested from 1828. Related: Unfaithfully; unfaithfulness.
