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Play dumb

verb, slang

Verb

1
To pretend to be dumb, either:; To feign muteness. idiomatic, informal
"I played dumb 'cause I knew if I talked at all, being simple and guileless, you all would twist me up and have the whole thing in a jiffy."
2
To pretend to be dumb, either:; To feign stupidity or ignorance of some knowledge, usually in order to avoid responsibility or gain some advantage. idiomatic, informal
"Died. Virginia Hill, 49, redheaded, free-spending playmate of the underworld... who later acted out a cameo role before the late Senator Estes Kefauver's Senate crime committee, playing dumb about the business dealings of her many racketeer friends."

Unscramble this word: playdumb