envoy
/ˈenvɔɪ/noun
1
- a messenger or representative, especially one on a diplomatic mission使者, 代表（尤指外交使节）。
2
- （亦作 envoy extraordinary）a minister plenipotentiary, ranking below ambassador and above chargé d'affaires特命全权公使。
词源
mid 17th cent.: from French envoyé, past participle of envoyer 'send', from en voie 'on the way', based on Latin via 'way'.