See dissemble in Webster's New World Roget's A-Z Thesaurus II
verb
To change or modify so as to prevent recognition of the true identity or character of:
camouflage, disguise, dissimulate, mask, masquerade. See showTo behave affectedly or insincerely or take on a false or misleading appearance of:
act, counterfeit, fake, feign, play-act, pose, pretend, put on, sham, simulate. See honest, true
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