ὑπερπον-έω · hyperpon-eō — LSJ
toil or labour beyond measure, undergo excessive strain, X. Mem. 1.2.4, Eq.Mag. 4.1; ὑ. τῷ πολέμῳ Plu. Nic. 21.
bear or endure for others, σφὼ δʼ ἀντʼ ἐκείνων τἀμὰ δυστήνου κακὰ ὑπερπονεῖτον S. OC 345; ὠδῖνας Pl. Lg. 717c.
in Med. c. gen. pers., τοῦδʼ ὑπερπονουμένῳ θανεῖν S. Aj. 1310.