inaudible.

Too faint or otherwise unavailable to be heard.

Use it for

Words that belong together

• inaudible reply
• almost inaudible

On the page

Her reply was inaudible beneath the engine.

Usage notes

Primary category: sensory / description. Forms: Normally non-gradable; no ordinary comparative or superlative. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description. Commonness: moderately common.