ἀχρειότης
From LSJ
οὕτω τι βαθὺ καὶ μυστηριῶδες ἡ σιγὴ καὶ νηφάλιον, ἡ δὲ μέθη λάλον → silence is something profound and mysterious and sober, but drunkenness chatters
English (LSJ)
ητος, ἡ,
A unprofitableness, worthlessness, LXX To.4.13.
German (Pape)
[Seite 419] ητος, ἡ, Untauglichkeit, LXX.