intermediary russian

• секунда́нт

  cornerman

  (History) a witness and an intermediary accompanying each of the combatants in a duel

• посре́днический

  intermediary, mediatory

• посре́дница

  intermediary, mediator, go-between, broker, middlewoman

• посре́дничавший

  mediating, having mediated, intervening, acting as an intermediary

• посре́дничающий

  mediating, intermediary, intervening