Words at Play : Top 10 Unusually Long and Interesting Words, Vol. 1

#7: Plenipotentiary

Definition:

invested with full power

About the word:

Since the mid-17th century a plenipotentiary has been "a person and especially a diplomatic agent invested with full power to transact business". (In Latin, plenus means full; potent means powerful). The term is rarely used these days in regular communication, but it endures in the diplomatic corps, where the minister plenipotentiary ranks below ambassador.

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