Unsuccessful
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 11:54的版本 （建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=unsuccessful+etymology&newwindow=1&hl=en ref] mid 17th century (originally as failer, in…”的新页面）
mid 17th century (originally as failer, in the senses ‘non-occurrence’ and ‘cessation of supply’): from Anglo-Norman French failer for Old French faillir (see fail).
wiktionary
un- + successful
etymonline
unsuccessful (adj.)
1610s, from un- (1) "not" + successful (adj.). Related: Unsuccessfully. A noun unsuccess "lack of success" is recorded from 1580s.
