ἄτρεστος
πενία μόνα τὰς τέχνας ἐγείρει → poverty alone promotes skilled work, necessity is the mother of invention, necessity is the mother of all invention, poverty is the mother of invention, out of necessity comes invention, out of necessity came invention, frugality is the mother of invention
English (LSJ)
ον, (τρέω)
A not trembling, fearless, Trag., and Pl.Cra.395c: c. gen., ἄ. μάχας fearless of fight, A.Pr.416 (lyr.); ἄ. ἐν μάχαις S.Aj. 365 (lyr.); ἄ. εὕδειν securely, Id.OT586. Adv. -τως A.Supp.240: neut. pl. ἄτρεστα as Adv., E.Ion1198.
German (Pape)
[Seite 388] nicht zitternd, unerschrocken, bes. Tragg., καρδία Aesch. Ag. 1375; μάχης Prom. 414; ἐν μάχαις Soph. Ai. 358; σὺν φόβοις entggstzt O. R. 586; ἄτρεστα adverbial Eur. Ion. 1198; so sp. D.; auch Plat. Crat. 395 b.