The definition of inaudible is something that can't be heard.
Having or making no noise.
Having or making no sound.
Very quietly. In soft tones.
Not speaking; voluntarily silent
Making or characterized by no sound or faint sound:
Seldom speaking; saying little; not talkative
The definition of audible is loud enough to be heard.
Find another word for unheard. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for unheard, like: inaudible, noiseless, soundless, hushed, quiet, mute, muffled, still, silent, audible and heard.