ἐτυμολογικός
From LSJ
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)
ή, όν,
A belonging to ἐτυμολογία, Eust.1799.25; -κά, τά, title of work by Chrysipp. (Stoic.2.9, al.); ἡ-κή the science of etymology, Varro LL7.109; τὸ -κόν an etymological dictionary, EM212.13 (pl.), Sch.Il.13.130 (pl.), etc. Adv. -κῶς Eust.396.15.