plenipotentiary
adjective/ˌplenɪpəˈtenʃəri/
/ˌplenɪpəˈtenʃieri/
(specialist)- having full powers to take action, make decisions, etc. to represent a government, especially in a foreign country
- plenipotentiary powers
- a plenipotentiary representative
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plenipotentiary