Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

subserviency; mediation, intervention, medium, intermedium†, vehicle, hand; agency &c 170. minister, handmaid; midwife, accoucheur [Fr.], accoucheuse [Fr.], obstetrician; gobetween; cat's-paw; stepping-stone. opener &c 260; key; master key, passkey, latchkey; open sesame; passport, passe-partout, safe-conduct, password. instrument &c 633; expedient &c (plan) 626; means &c 632. V. subserve, minister, mediate, intervene; be instrumental &c adj.; pander to; officiate; tend. Adj. instrumental; useful &c 644; ministerial, subservient, mediatorial†; intermediate, intervening; conducive. Adv. through, by, per; whereby, thereby, hereby; by the agency of &c 170; by dint of; by virtue of, in virtue of; through the medium of &c n.; along with; on the shoulders of; by means of &c 632; by the aid of, with the aid of &c (assistance) 707. per fas et nefas [Lat.], by fair means or foul; somehow, somehow or other; by hook or by crook.