εὐσταλῶς
From LSJ
Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.
French (Bailly abrégé)
adv.
avec agilité, lestement.
Étymologie: εὐσταλής.
Russian (Dvoretsky)
εὐστᾰλῶς: благовоспитанно, прилично (ἀναβεβλημένος Luc.).