(ש"ע) שליח

n. messenger, envoy, delegate, representative

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Noun
1. someone sent on a mission to represent the interests of someone else
(synonym) envoy
(hypernym) representative
(hyponym) legate, official emissary

n. emisar

(n.)
An agent employed to advance, in a covert manner, the interests of his employers; one sent out by any power that is at war with another, to create dissatisfaction among the people of the latter.
  

(a.)
Exploring; spying.
  

(a.)
Applied to the veins which pass out of the cranium through apertures in its walls.