ὀκριάομαι
From LSJ
νέῳ δὲ σιγᾶν μᾶλλον ἢ λαλεῖν πρέπει → it's fitting for a young man to keep silence rather than to speak (Menander)
English (LSJ)
Pass., (ὄκρις)
A to be made rough or jagged : metaph., πανθυμαδὸν ὀκριόωντο they grew furiously angry with each other, Od.18.33 ; ὠκριωμένος enraged, Lyc.545.