εὐκρατῶς
From LSJ
ἀλλ᾽ οὐδὲ εἷς τέκτων ὀχυρὰν οὕτως ἐποίησεν θύραν, δι᾽ἧς γαλῆ καὶ μοιχὸς οὐκ εἰσέρχεται → but no carpenter ever made a door so secure that a weasel or a womanizer could not pass through it
English (LSJ)
Adv. (Adj. -κρᾰτής is not found)
A firmly, fast, ἔχειν τι Arist.Pr.875a22; cf. δυσκρατής.
German (Pape)
[Seite 1076] ἔχει, Arist. probl. 3, 26, adv. von dem nicht vorkommenden εὐκρατής, festhaltend, se st.
Greek (Liddell-Scott)
εὐκρᾰτῶς: Ἐπίρρ., στερεῶς, ὅταν ξύλον μακρὸν ἢ μέγα μὴ εὐκρατῶς ἔχῃ τις, ὅταν δὲν κρατῇ αὐτὸ καλά, Ἀριστ. Προβλ. 3. 26, ὡς εἰ ἐξ ἐπιθ. εὐκρατής.