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εὐερκῶς

From LSJ

Νέµουσι δ' οἴκους καὶ τὰ ναυστολούµενα ἔσω δόµων σῴζουσιν, οὐδ' ἐρηµίᾳ γυναικὸς οἶκος εὐπινὴς οὐδ' ὄλβιος → They manage households, and save what is brought by sea within the home, and no house deprived of a woman can be tidy and prosperous

Euripides, Melanippe Captiva, Fragment 6.11

French (Bailly abrégé)

adv.
dans une position inexpugnable.
Étymologie: εὐερκής.

Russian (Dvoretsky)

εὐερκῶς: в хорошо укрепленном состоянии: εὐ. χαρακοῦν τι Plut. хорошо защитить что-л.