stimulator

stĭmŭlātor, ōris, m. [stimulo],

a pricker-on , instigator , stimulator , Claud. ap. Ruf. 2, 501; Mamert. Grat. Act. ad Iul. 5 (in Cic. Dom. 5, 11, Orell. and B. and K. read instimulator); Vulg. Jer. 46, 20.