† plenipotentiarizev.Obsolete (intransitive) to act as a plenipotentiary.
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society > authority > rule or government > politics > international politics or relations > diplomacy > act or serve as diplomat [verb (intransitive)] > serve as plenipotentiary
plenipotentiarize1841
1841 Fraser's Mag.24 737 The other continued to plenipotentiarise till he..forced his government to dismiss him in disgrace.