N. silence, muteness, obmutescence, taciturnity, pauciloquy, costiveness|, curtness, reserve, reticence, man of few words

V. be silent, keep silence, keep mum, hold one's tongue, hold one's peace, hold one's jaw, not speak, &c. 582, say nothing, keep one's counsel, seal the lips, close the lips, button the lips, zipper the lips, put a padlock on the lips, put a padlock on the mouth, put a bridle on one's tongue, bite one's tongue, keep one's tongue between one's teeth, make no sign, not let a word escape one, keep a secret, not have a word to say, hush up, hush, lay the finger on the lips, place the finger on the lips, render mute, stick in one's throat

Adj. silent, mute, mum, silent as a post, silent as a stone, silent as the grave, dumb, unconversable, taciturn, sparing of words, closetongued, costive|, inconversable|, curt, reserved, reticent

Phr. cave quid dicis quando et cui, volto sciolto i pensieri stretti

Int. shush, tush, silence, mum, hush, chut, hist, tut, chup, mum's the word, keep your mouth shut, [vulgar]