Englishnegotiator
noun
a team of negotiators from the UN Security Council sought to resolve the situation:
mediator, arbitrator, arbiter, moderator, go-between, middleman, intermediary, intercessor, interceder, intervener, conciliator;
representative, spokesperson, agent, broker, honest broker, ambassador, diplomat, peacemaker;
bargainer, haggler, wheeler-dealer;
rare negotiant.
negotiator Oxford Dictionary of English