Synonyms of silent

1. silent, soundless, still, quiet (vs. noisy): usage: marked by absence of sound; "a silent house"; "soundless footsteps on the grass"; "the night was still"
2. mum, silent, uncommunicative (vs. communicative), incommunicative: usage: failing to speak or communicate etc when expected to; "the witness remained silent"
3. silent, tacit, understood, implicit (vs. explicit), inexplicit: usage: implied by or inferred from actions or statements; "gave silent consent"; "a tacit agreement"; "the understood provisos of a custody agreement"
4. silent, unsounded, inaudible (vs. audible), unhearable: usage: not made to sound; "the silent `h' at the beginning of `honor'"; "in French certain letters are often unsounded"
5. silent, inaudible (vs. audible), unhearable: usage: having a frequency below or above the range of human audibility; "a silent dog whistle"
6. dumb, mute, silent, inarticulate (vs. articulate), unarticulate: usage: unable to speak because of hereditary deafness