"muffling" in the verb sense
1. smother, stifle, strangle, muffle, repress
suppress in order to conceal or hide
"smother a yawn"
"muffle one's anger"
"strangle a laugh"
"repress a cry of fear"
2. muffle, mute, dull, damp, dampen, tone down
deaden (a sound or noise), especially by wrapping
Source: WordNet® (An amazing lexical database of English)
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