Learn how to say Plenipotentiaries correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word plenipotentiary:
noun (plural plenipotentiaries)
a person, especially a diplomat, invested with the full power of independent action on behalf of their government, typically in a foreign country.
having full power to take independent action:
a minister plenipotentiary
(of power) absolute:
he went armed with plenipotentiary powers, to take whatever measures he felt necessary
mid 17th century: from medieval Latin plenipotentiarius, from plenus ‘full’ + potentia ‘power’