mediator russian

• посре́дник

  mediator, intermediary, negotiator, go-between, middleman, umpire

• засту́пник

  defender, intercessor, mediator, patron

• посре́днический

  intermediary, mediatory

Examples

• Давай урегули́руем э́тот вопро́с без посре́дников.Let's settle the matter without a mediator.