Apparently a primary verb; to tower up (be conspicuous), i.e. (by implication) to be suitable or proper (third person singular present indicative, often used impersonally, it is fit or right) -- become, comely.
ἔπρεπεν (eprepen) − 2 Occurrences
πρέπει (prepei) − 3 Occurrences
πρέπον (prepon) − 2 Occurrences