aphonic brief brusque calm checked close close-lipped close-tongued closemouthed concise curbed curt dumb echoless economical of words hush as death hushed implicit implied inactive inarticulate inaudible incoherent indisposed to talk inhibited laconic mousy mum mute muted noiseless pacific passive peaceful placid quiescent quiet reserved restrained reticent secretive serene short sleeping snug soundless sparing of words speechless still still as death stilly subaudible tacit taciturn terse tight-lipped tongue-tied tranquil unagitated unarticulated uncommunicative undeclared understood undisturbed unexpressed unhearable unloquacious unmentioned unproclaimed unpronounced unpublished unrecorded unruffled unsaid unsociable unsounded unspoken unstated unsung untalkative untalked-of untold untroubled unuttered unvocalized unvoiced unwritten voiceless whist word-bound wordless