/ kəmˈpʌŋkʃn; NAmE / noun
[ U ] (also [C] in AmE ) compunction (about doing sth) ( formal ) a guilty feeling about doing sth :
She felt no compunction about leaving her job.
He had lied to her without compunction.
( US )
She has no compunctions about rejecting the plan.
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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.