κατὰ νοῦν
From LSJ
ὑπὸ δὲ τῆς φιλαυτίας παρηγμένοι ἄλογα φασὶν τὰ ζῷα ἐφεξῆς τὰ ἄλλα σύμπαντα → it is self-love which leads them to say that all the other animals without exception are non-rational
Greek > English (Woodhouse)
satisfactorily, according to one's liking, according to one's wishes, to one's heart's content, to one's liking, to one's mind, to one's taste