audible Antonyms

inaudible silent quiet silentious soundless speechless still stilled turbid unconspicuous unheard unobtrusive moult shrouded muffled muffler muzzled noiseless occulted perdu quiescent secretive unseen unshaped tightlipped unarticulate unexpressed unhearable unsounded unverbalized as quiet as a mouse as quiet as the grave as silent as the grave hushful unclear undetectable vague voiceless whist lens cap low-pitched nonvisual unuttered clear as mud could hear a pin drop clammed up ambiguous covert cryptic depressed