ἀνδρὸς σπλάγχνον ἐκμαθεῖν → learn a man's heart, learn a man's inward nature
oi: interj., an exclamation of complaint, of one weeping:I Ph. I intro nunc jam. Do. Oi! ei! Ter. Eun. 4, 4, 47: oi! hui! id. Phorm, 4, 3, 58.
oi INTERJ :: oh! ah!