muffled
/ˈmʌfl̩d/ adjective C1- Stifled or covered up; diminished by interference. · A muffled curse escaped my lips.
From the library
It was not very loud—it seemed to be muffled.
The sound from a shotgun is to some extent muffled when the discharge is at very close range, as it undoubtedly was in this instance.
He was a long chap, with a red face, the lower part muffled round——”
And then--something--moved beneath them, there was a gasp and a cry--and somebody said in muffled accents:
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