[Noun] Doing something without compunction means that you feel no guilt or shame about doing it. Example: She felt no compunction about cancelling her date with George and going out with Bob instead.
Found on http://www.bbc.co.uk/skillswise/glossary/
Com·punc'tion noun [ Old French compunction , French componction , Latin compunctio , from compungere , compunctum , to prick; com- + pungere to prick, sting. See Pungent .] 1. A pricking; stimulation. [ Obsolete] « That acid a... Found on http://www.encyclo.co.uk/webster/C/125
compunction 1. A strong feeling of uneasiness or anxiety of the conscience caused by regret or guilt for doing wrong or causing pain; contrition; remorse; penitence. 2. Any uneasiness or hesitation about the rightness of an action. 3. A sting of conscience or a pang of doubt aroused by wrongdoing or the prospect of wrongdoing. Found on http://www.wordinfo.info/words/index/info/view_unit/1798/2