re-,向后，相反，-cus,原因，理由，词源同 cause,because.即不断找相反的理由的，引申词义 拒绝，反对。
- recusant: see refuse
- recusant (adj.)
- "obstinate in refusal," 1550s, from Latin recusantem (nominative recusans) "refusing to obey," present participle of recusare "make an objection against; decline, refuse, reject; be reluctant to" (see recuse). The noun meaning "one obstinate in refusing" is from 1610s.