To hide under a false semblance or seeming; to feign (something) not to be what it really is; to put an untrue appearance upon; to disguise; to mask.
To put on the semblance of; to make pretense of; to simulate; to feign.
To conceal the real fact, motives, intention, or sentiments, under some pretense; to assume a false appearance; to act the hypocrite.
make believe with the intent to deceive; "He feigned that he was ill"; "He shammed a headache"
hide under a false appearance; "He masked his disappointment"
to disguise, to mask, to feign, to assume a false appearance [CED
To disguise or conceal behind a false appearance. See Synonyms at disguise. Detailed description
disguise or conceal the real nature of, as in: I'd rather be honest about my shortcomings than dissemble or pretend to be something I'm not.