ἀποκείρεσθαι
From LSJ
Καλὸν τὸ μηδὲν εἰς φίλους ἁμαρτάνειν → Nihil peccare in amicos est pulcherrimum → Gut ist, sich gegen Freunde nicht versündigen
Greek > English (Woodhouse Verbs Reversed)
(see also: ἀποκείρω) crop, cut off one's own hair, cut one's hair