γενειαστήρ
From LSJ
σκληρόν σοι πρὸς κέντρα λακτίζειν → it is hard for thee to kick against the pricks, it is hard for you to kick against the goads
English (LSJ)
γενειαστῆρος, ὁ, chin-strap of a bridle, Poll. 1.147.
Spanish (DGE)
-ῆρος, ὁ
carrillera en la brida de los caballos, Poll.1.147, Hippiatr.Cant.93.20.
Greek (Liddell-Scott)
γενειαστήρ: ὁ, ὁ περὶ τὰ γένεια ἱμάς, Πολυδ. Α΄, 147.