τὸ πρόβατον, -ου – a sheep (mostly pl.: τὰ πρόβατα, which can also mean: “sheep and goats”)
τὰ πρόβατα ἥμερα ζῷά ἐστιν· καλεῖται δὲ οὕτως ὅτι ἀεὶ προ-βαίνει. τίς δ’ ἐστὶν ἡ φωνὴ τῶν προβάτων; ἑλληνιστὶ τὰ πρόβατα βληχᾶται λέγοντα· βῆ βῆ.
Sheep are tame animals. The are called like this (pro-baton) because they always „go forward“ (pro-bainei). What is the sound that the sheep make? In Greek the sheep bleat by saying: Baa, baa.