Inaudible is a 9 letter English word. It's valid Scrabble word worth 12 points. It's valid Words with friends word worth 16 points.
You can make 388 anagrams from letters in inaudible (abdeiilnu).
First recorded in 1595-1605; in-3 + audible
The other voice was lower in key and the words were inaudible.
Kirkwood settled himself with an inaudible sigh of pleasure.
He managed to make it inaudible, however; and it was as well that he did.
Once the night fell the sea was the smuggler's own: he was invisible, inaudible.
The cabman got on to his box, muttering something that was inaudible.
I could see now and then that he was speaking, but he was inaudible.
Under cover of the music her voice was inaudible to any one else.
He was, as great orators will sometimes be, “inaudible in the gallery.”
L. Jinny explains that “the love is all drowned in [inaudible].”
That terrific holocaust of death and destruction was inaudible.
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