dis•sim•u•latePronunciation: (di-sim'yu-lāt"), [key]
—v., -lat•ed, -lat•ing.
to disguise or conceal under a false appearance; dissemble: to dissimulate one's true feelings about a rival.
to conceal one's true motives, thoughts, etc., by some pretense; speak or act hypocritically.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.