dissimulate

Etymology

From Latin dissimulare; compare obsolete dissimule (“to conceal, disguise”), from Old French dissimuler, ultimately from the same Latin root.

verb

1. (intransitive) To practise deception by concealment or omission, or by feigning a false appearance.
2. (transitive) To disguise or hide by adopting a false appearance.
3. (transitive, rare) To connive at; to wink at; to pretend not to notice.
   That al thyng be forgiven to theim that be olde and broken, and to theim that be yonge and lusty to dissimulate for a time, and nothyng to be forgiuen to very yong children. 1533 John Bourchier (Lord Berners), The Golden Boke of Marcus Aurelius 9

adj

1. (obsolete) Feigning; simulating; pretending.
   This fenyeit foxe, fals and dissimulate, Maid to this cok ane cavillatioun […] c. 1480, Robert Henryson, The Cock and the Fox