- inaudible (adj.)
- mid-15c., "unfit to be heard;" c. 1600, "unable to be heard," from Latin inaudibilis "inaudible," from in- ânotâ (see in- (1)) + audibilis (see audible). Related: Inaudibly; inaudibility.
- audibleness
- "The quality of being audible; audibility", Mid 17th cent. From audible + -ness. Compare earlier audibility.