Of or relating to a mediator or the duties of a mediator.

Roget 631: instrumental; useful etc. 644; ministerial, subservient, mediatorial^†; intermediate, intervening; conducive.   

Roget 766: deprecatory, expostulatory^†, intercessory, mediatorial^†.    deprecated, protested.    unsought, unbesought^†; unasked etc. (ask) etc. 765.    ... meer laten zien