χήρευσις
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)
ἡ,
A = χηρεία 1, LXX Ge.38.14, Ju.8.5. II separation from a husband, Leg.Gort.3.45.
German (Pape)
[Seite 1354] ἡ, = χηρεία, LXX.