IPA: /ɪˈnɔːdəbl/
KK: /ɪˈnɔːdəbl/
Something that cannot be heard or is too quiet to be heard clearly.
The speaker's voice was so soft that it was almost inaudible in the noisy room.
Inaudible → It is formed from "in-" (meaning not) and "audire" (meaning to hear). The word describes something that cannot be heard.
Think of 'not hearing' ('in-' means not and 'audire' means to hear') — that's why inaudible refers to something you can't hear.