|Noah Webster's Dictionary|
1. (v. t.) To disguise or conceal one's true nature; 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.
2. (v. t.) To put on the semblance of; to make pretense of; to simulate; to feign.
3. (v. i.) To conceal the real fact, motives, or sentiments, under some pretense; to assume a false appearance; to act the hypocrite.
Dissemble (2 Occurrences)
Galatians 2:13 And the other Jews dissembled likewise with him; insomuch that Barnabas also was carried away with their dissimulation. (Root in KJV ASV WBS YLT)
Proverbs 26:24 He that hateth dissembleth with his lips, and layeth up deceit within him; (Root in KJV JPS ASV DBY WBS YLT RSV)