- inaudible (adj.)
[inaudible 词源字典]
- 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.[inaudible etymology, inaudible origin, 英语词源]