tac·it / ˈtasit/ • adj. understood or implied without being stated: your silence may be taken to mean tacit agreement.DERIVATIVES: tac·it·ly adv.ORIGIN: early 17th cent. (in the sense ‘wordless, noiseless’): from Latin tacitus, past participle of tacere ‘be silent.’

TACIT

Implied, inferred, understood without being expressly stated.

Tacit refers to something done or made in silence, as in a tacit agreement. A tacit understanding is manifested by the fact that no contradiction or objection is made and is thus inferred from the situation and the circumstances.

tacit XVII. — L. tacitus, prop. pp. of tacēre be silent.
So taciturn XVIII. — F. taciturne or L. taciturnus. taciturnity XV. — (O)F. or L.