Definition of compunction noun from the Oxford Advanced Learner's Dictionary

 

compunction

 noun
noun
BrE BrE//kəmˈpʌŋkʃn//
 
; NAmE NAmE//kəmˈpʌŋkʃn//
 
[uncountable]
 
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(also [C] in NAmE) compunction (about doing something) (formal) a guilty feeling about doing something She felt no compunction about leaving her job. He had lied to her without compunction. (North American English) She has no compunctions about rejecting the plan. Word Origin Middle English: from Old French componction, from ecclesiastical Latin compunctio(n-), from Latin compungere ‘prick sharply’, from com- (expressing intensive force) + pungere ‘to prick’.
See the Oxford Advanced American Dictionary entry: compunction