ἀστεμβής

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)

Source

Spanish (DGE)

ἀθαμβής, ἀτάραχος Hsch.

German (Pape)

ές, = ἀστεμφής, Vetera Lexica.