let on

pretend; expose a secret

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Verb
1. make known to the public information that was previously known only to a few people or that was meant to be kept a secret; "The auction house would not disclose the price at which the van Gogh had sold"; "The actress won't reveal how old she is"; "bring out the truth"; "he broke the news to her"
(synonym) disclose, bring out, reveal, discover, expose, divulge, impart, break, give away, let out
(hypernym) tell
(hyponym) blackwash
(cause) break, get out, get around
(verb-group) break, get out, get around

ujawniać

reveal, inform Please don`t let on that you saw me at the movie last night.

Synonyms and related words:
acknowledge, act, act a part, admit, admit everything, affect, allow, assume, avow, betray, bluff, come clean, concede, confess, cop a plea, counterfeit, cover up, disclose, dissemble, dissimulate, divulge, fake, feign, four-flush, gammon, give away, grant, let on like, let out, make a pretense, make as if, make believe, make like, open up, out with it, own, own up, play, play a part, play possum, playact, plead guilty, pretend, profess, put on, sham, simulate, spill, spill it, spit it out, tell, tell all, tell the truth, uncover