noun
a person, especially a woman, who is sexually immodest or promiscuous
adjective
deliberate and unprovoked, excessive or unrestrained, sexually immodest or promiscuous
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The wanton destruction of public property will not be tolerated.
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She was accused of engaging in wanton behavior at the party.
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Stop being so wanton and reckless with your decisions.
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His wanton disregard for the rules eventually caught up with him.