Main entry: sham, dissemble, feign, pretend, affect
Definition: make believe with the intent to deceive
Usage: He feigned that he was ill; He shammed a headache
Main entry: dissemble, pretend, act
Definition: behave unnaturally or affectedly
Usage: She's just acting
Main entry: cloak, mask, dissemble
Definition: hide under a false appearance
Usage: He masked his disappointment