ἀστεμβής

From LSJ

ἀφυής πρὸς ταύτην τὴν σκέψιν → wanting wit for that speculation

Source

Spanish (DGE)

ἀθαμβής, ἀτάραχος Hsch.

German (Pape)

ές, = ἀστεμφής, Vetera Lexica.