良心

conscience
凭～办事 act according to one’s conscience/受到～责备 have a guilty (or bad) conscience/说句～话to be fair;in all fairness/有～的人people with a conscience;good-hearted people/没～conscienceless;ungrateful;heartless/～问题casus conscientiae [拉](a case of conscience)/～上感到不安have an uneasy conscience