inaudible

 
Pronunciation: /ɪnˈɔːdɪb(ə)l/

adjective

  • unable to be heard: inaudible pulses of high-frequency sound

Derivatives

inaudibility

Pronunciation: /-ˈbɪlɪti/
noun

inaudibly

adverb

Origin:

late Middle English: from late Latin inaudibilis, from in- 'not' + audibilis (see audible)