"muzzled" in the verb sense
1. muzzle
fit with a muzzle
"muzzle the dog to prevent it from biting strangers"
2. gag, muzzle
prevent from speaking out
"The press was gagged"
3. gag, muzzle
tie a gag around someone's mouth in order to silence them
"The burglars gagged the home owner and tied him to a chair"
Source: WordNet® (An amazing lexical database of English)
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