Dissimulate means:
* To conceal one's true feelings or intentions.
* To pretend to have feelings, beliefs, or intentions that one does not actually have.
* To hide something by pretending it does not exist.
For example:
* "He dissembled his true intentions by acting friendly towards his rivals."
* "The actress dissembled her nervousness by putting on a brave face."
Let me know if you'd like to know more about "dissimulate"!