en·voy 1 
(ĕnvoi′, ŏn-)
(ĕnvoi′, ŏn-)n.
1. A representative of a government who is sent on a special diplomatic mission.
2. A minister plenipotentiary assigned to a foreign embassy, ranking next below the ambassador.
3. A messenger; an agent.
[French envoyé, messenger, from past participle of envoyer, to send, from Old French envoier, from Late Latin inviāre, to be on the way : Latin in-, in, on; see EN-1 + Latin via, way; see wegh- in the Appendix of Indo-European roots.]