adjectives
marked by absence of sound
"a silent house"; "soundless footsteps on the grass"; "the night was still"
failing to speak or communicate etc when expected to
"the witness remained silent"
implied by or inferred from actions or statements
"gave silent consent"; "a tacit agreement"; "the understood provisos of a custody agreement"
not made to sound
"the silent `h' at the beginning of `honor'"; "in French certain letters are often unsounded"
having a frequency below or above the range of human audibility
"a silent dog whistle"
is similar to
impossible to hear; imperceptible by the ear
"an inaudible conversation"
unable to speak because of hereditary deafness