ματαιοπόνος
From LSJ
Ὁ δὲ μὴ δυνάμενος κοινωνεῖν ἢ μηδὲν δεόμενος δι' αὐτάρκειαν οὐθὲν μέρος πόλεως, ὥστε ἢ θηρίον ἢ θεός → Whoever is incapable of associating, or has no need to because of self-sufficiency, is no part of a state; so he is either a beast or a god
English (LSJ)
ον,
A labouring in vain, τεχνίτης Ph.2.500; ματαιοπόνον ἀποκαλεῖν τὴν φύσιν Gal.UP5.5, cf. Apollon.Cit. 3.
Greek (Liddell-Scott)
μᾰταιοπόνος: -ον, ὁ ματαίως κοπιῶν, ματαιοκόπος, Φίλων 2.500.