εὐρωστία
From LSJ
ἀμήχανον δὲ παντὸς ἀνδρὸς ἐκμαθεῖν ψυχήν τε καὶ φρόνημα καὶ γνώμην, πρὶν ἂν ἀρχαῖς τε καὶ νόμοισιν ἐντριβὴς φανῇ → hard it is to learn the mind of any mortal or the heart, 'till he be tried in chief authority | it is impossible to know fully any man's character, will, or judgment, until he has been proved by the test of rule and law-giving
English (LSJ)
ἡ,
A stoutness, strength, Arist.Mir.830a9, D.S.17.88, PRyl.235.8 (ii A.D.); τῆς ψυχῆς Plu.Cat.Mi.44; personified, Εὐ. Ath.Mitt.32.308 (Pergam.).
Greek (Liddell-Scott)
εὐρωστία: ἡ, καλὴ κατάστασις τοῦ σώματος, ἰσχύς, δύναμις, Ἀριστ. π. Θαυμ. 1. 2· τῆς ψυχῆς Πλουτ. Κάτων Νεώτ. 44.
French (Bailly abrégé)
ας (ἡ) :
force, vigueur.
Étymologie: εὔρωστος.