Synonyms of inaudible

Adjective

1. inaudible (vs. audible), unhearable, breathed, voiceless, infrasonic, silent, silent, unsounded, supersonic, ultrasonic, unheard, imperceptible#1, unperceivable, quiet

usage: impossible to hear; imperceptible by the ear; "an inaudible conversation"

Definition and meaning of inaudible (Dictionary)