What is another word for "mediatorial"?

Roget's Thesaurus (1911) lists these synonyms for "mediatorial": accoucheur, accoucheuse, agency, aid, along, assistance, conducive, crook, dint, expedient, fair, foul, hand, handmaid, hereby, hook, instrument, instrumental, instrumentality, intermediate, intermedium, intervene, intervention, key, latchkey, master, mediate, mediation, medium, midwife, minister, ministerial, obstetrician, officiate, open, opener, other, pander, passport, password.