Roget's Thesaurus

#585. Taciturnity

Nouns

silence, muteness, obmutescence; taciturnity, pauciloquy, costiveness, curtness; reserve, reticence etc. (concealment) 528. man of few words.

Verbs

be silent etc. adj.; keep silence, keep mum; hold one's tongue, hold one's peace, hold one's jaw; not speak. etc. 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 etc. 528; not have a word to say; hush up, hush, lay the finger on the lips, place the finger on the lips; render mute etc. 581. stick in one's throat.

Adjectives

silent, mute, mum; silent as a post, silent as a stone, silent as the grave etc. (still) 403; dumb etc. 581; unconversable. taciturn, sparing of words; closetongued; costive, inconversable, curt; reserved; reticent etc. (concealing) 528.

Interjections

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

Phrases

cave quid dicis quando et cui [Lat.]; volto sciolto i pensieri stretti [It.].