ὑπέρθυμος
From LSJ
ἔκστασίς τίς ἐστιν ἐν τῇ γενέσει τὸ παρὰ φύσιν τοῦ κατὰ φύσιν → what is contrary to nature is any developmental aberration from what is in accord with nature (Aristotle, On the Heavens 286a19)
English (LSJ)
ον,
A high-spirited, high-minded, daring, freq. in Hom., in good sense, Il.2.746, 5.376, al., cf. Hes.Th.937, Pi.P.4.13, B.12.103, etc.: irreg. Sup., ὑπερθυμέστατος ἀνδρῶν Stesich.95. II in bad sense, overweening, Od.7.59, Hes.Th.719, AP6.332 (Hadr.); over-spirited, of a horse, X.Eq.3.12. III vehemently angry, Poll.6.124. Adv., ὑπερθύμως ἄγαν in over-vehement wrath, A.Eu. 824. IV in Adv. also, eagerly, readily, IGRom.4.1302.12 (Cyme, i B. C./i A. D.).