could hear a pin drop

buttoned-up clammed up close close-mouthed dumb hushed hushful inaudible low low-pitched muffled mute muted noiseless not saying boo peaceful quiescent quieted reserved restrained reticent secretive silent soft soundless speechless still stilled subdued taciturn tasteful tight-lipped uncommunicative unexpressed unobtrusive unspeaking unuttered whist

muted peaceful reticent silent soft

close hushed low muffled mute quieted reserved still stilled whist

buttoned-up clammed up close-mouthed dumb hushful inaudible low-pitched noiseless not saying boo quiescent secretive soundless speechless taciturn tight-lipped uncommunicative unexpressed unspeaking unuttered

clamorous communicative noisy

unreserved

agitated boisterous complex complicated intricate loud obtrusive troubled