(a.) Of or pertaining to a mediator, or to mediation; mediatory; as, a mediatorial office.

agential agentival agentive aidful assisting beneficial conducive to constructive contributory employable facilitating favoring forwarding furthersome good for handy helpful inclined toward inclining toward instrumental intermediary leading to mediating mediatorial ministerial ministering positive profitable promoting remedial salutary serviceable subservient tending to therapeutic useful