To disguise (one's intentions, for example) under a feigned appearance. See Synonyms at disguise.(verb-transitive)
To conceal one's true feelings or intentions.(verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "dissimulate" in a sentence
"We have not the strength with which to fight this man; we must dissimulate, and win, if win we can, by craft."
"Gaddis also explained why diplomats must dissimulate and are therefore not only frustrating to historians but misunderstood by all sides in politics:"
"But the Internet has inundated us with information delivered through an array of online services "so vast and incomprehensible that we can't dissimulate," says Juels."