ἐκμαρτυρεῖν
From LSJ
τίς ἐς σὸν κρᾶτ' ἐπύκτευσεν → who hit you with the fist on the head, who has been pummeling your head
Greek > English (Woodhouse Verbs Reversed)
(see also ἐκμαρτυρέω): bear witness to a thing, bear witness to, bear witness, give evidence