Simple past tense and past participle of quiet.(verb)
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Use "quieted" in a sentence
"Once again, as if by executive order, bonds of community were declared to be strong and enduring, the divisions and contradictions within quieted by the uniquely menacing threat from without."
"He crossed the stile, and with a word quieted Sally's dog as it rose to challenge him, and then went with him, licking his hand."
"The word quieted him, and with a gasp his mind seemed to change at once."