HIGGINS [almost audibly, past endurance] God of Heaven! another of them.
I always been a good girl; and I never offered to say a word to him; and I don’t owe him nothing; and I don’t care; and I won’t be put upon; and I have my feelings the same as anyone else— Mrs. Pearce shuts the door; and Eliza’s plaints are no longer audible.
There are no more uses of "audible" in the play.
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She spoke in a barely audible whisper.
It was so quiet, our breathing was the only thing audible in the room.