συνάσκησις
From LSJ
Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.
English (LSJ)
εως, ἡ,
A training, opp. φύσις, Phld.Rh.1.1, cf. D.H.2.74, S.E.M.7.146, 11.248; military training, Ael.Tact.3.1; σ. ὅπλων Lyd.Mag.3.33.
German (Pape)
[Seite 1005] ἡ, gemeinschaftliche Uebung; Clem. Al.; S. Emp.