ὠδίνειν
From LSJ
ὁ γὰρ μανθάνων κιθαρίζειν κιθαρίζων μανθάνει κιθαρίζειν → he who is learning the harp, learns the harp by harping
Greek > English (Woodhouse Verbs Reversed)
(see also ὠδίνω): be in labour, be in labor, be in the throes of labor, be in the throes of labour, be in travail