'Dissemble' definitions:

Definition of 'dissemble'

verb

Make believe with the intent to deceive; "He feigned that he was ill"; "He shammed a headache" [syn: feign, sham, pretend, affect, dissemble]

verb

Hide under a false appearance; "He masked his disappointment" [syn: dissemble, cloak, mask]

verb

Behave unnaturally or affectedly; "She's just acting" [syn: dissemble, pretend, act]

From: GCIDE

Dissemble \Dis*sem"ble\, v. i. To conceal the real fact, motives, intention, or sentiments, under some pretense; to assume a false appearance; to act the hypocrite. [1913 Webster]
He that hateth dissembleth with his lips. --Prov. xxvi. 24. [1913 Webster]
He [an enemy] dissembles when he assumes an air of friendship. --C. J. Smith. [1913 Webster]

From: GCIDE

Dissemble \Dis*sem"ble\, v. t. [imp. & p. p. Dissembled; p. pr. & vb. n. Dissembling.] [OF. dissembler to be dissimilar; pref. dis- (L. dis-) + F. sembler to seem, L. simulare to simulate; cf. L. dissimulare to dissemble. See Simulate, and cf. Dissimulate.]
1. 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. [1913 Webster]
Dissemble all your griefs and discontents. --Shak. [1913 Webster]
Perhaps it was right to dissemble your love, But -- why did you kick me down stairs? --J. P. Kemble. [1913 Webster]
2. To put on the semblance of; to make pretense of; to simulate; to feign. [1913 Webster]
He soon dissembled a sleep. --Tatler.
Syn: To conceal; disguise; cloak; cover; equivocate. See Conceal. [1913 Webster]