ἀντίφαρις

From LSJ

ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)

Source

Spanish (DGE)

-εως, ἡ rival, POxy.2389.9.8.