Simple past tense and past participle of placate.(verb)
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Use "placated" in a sentence
"I thought Sarah Failin placated the Radical Wrong. peace, mjh"
"But they cannot placate them the way those critics want to be placated, meaning, by allowing a strong appreciation, because this would be too harmful for their exports and growth."
"After that, he "placated" a Democrat heckler-type by observing that he had served as a successful mayor of a city full of nothing but Democrats; therefore he saw no reason why competing parties couldn't work out their differences."