to hide something; keep information secret

hide, disguise

of hide

conceal; remain unseen

a hidden place where wild animals, birds etc may be observed, e.g. by photographers; (an) animal's skin

conceal; remain unseen

of lie

tell an untruth

to make oneself appear (to be (doing) something) either in play or to deceive others

fake, falsify

to declare that one has (beliefs, likes, ignorance, interests etc)

declare, assert

to pretend to be, have or feel (something)

pretend, imitate