N. instrumentality, aid, subservience, subserviency, mediation, intervention, medium, intermedium, vehicle, hand, agency, minister, handmaid, midwife, accoucheur, accoucheuse, obstetrician, gobetween, cat's-paw, stepping-stone, opener, key, master key, passkey, latchkey, "open sesame", passport, passe-partout, safe-conduct, password, instrument, expedient, means

V. subserve, minister, mediate, intervene, be instrumental, pander to, officiate, tend

Adj. instrumental, useful, ministerial, subservient, mediatorial, intermediate, intervening, conducive

Adv. through, by, per, whereby, thereby, hereby, by the agency of, by dint of, by virtue of, in virtue of, through the medium of, along with, on the shoulders of, by means of, by the aid of, with the aid of, per fas et nefas, by fair means or foul, somehow, somehow or other, by hook or by crook