#1 dissemble v. [feign, sham, pretend, affect] make believe with the intent to deceive; "He feigned that he was ill"; "He shammed a headache". wn
#2 dissemble v. [cloak, mask] hide under a false appearance; "He masked his disappointment". wn
#3 dissemble v. [pretend, act] behave unnaturally or affectedly; "She's just acting". wn
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