Infidelity
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 23:17的版本 （建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=infidelity+etymology&newwindow=1&hl=en ref] late Middle English (in the senses ‘lack of…”的新页面）
late Middle English (in the senses ‘lack of faith’ and ‘disloyalty’): from Old French infidelite or Latin infidelitas, from infidelis ‘not faithful’ (see infidel).
wiktionary
From Middle French infidélité, from Latin infidelitas. Equivalent to infidel + -ity.
etymonline
infidelity (n.)
c. 1400, "want of faith, unbelief in religion; false belief, paganism;" also (early 15c.) "unfaithfulness or disloyalty to a person" (originally to a sovereign, by 16c. to a lover or spouse), from French infidélité (12c.) or directly from Latin infidelitatem (nominative infidelitas) "unfaithfulness, faithlessness," noun of quality from infidelis "unfaithful, unbelieving" (see infidel).
