initiator
From LSJ
ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)
English > Greek (Woodhouse)
subs.
Introducer: P. εἰσηγητής, ὁ.
Latin > English (Lewis & Short)
ĭnĭtĭātor: ōris, m. id.,
I an originator, founder (late Lat.): novi testamenti, Tert. adv. Marc. 4, 14.