φύλαξις
From LSJ
Τὸ μανθάνειν δ' ἥδιστον εὖ λέγοντος, εἰ κέρδος λέγοι → It is the sweetest thing to learn from one speaking well, if they speak profitably
English (LSJ)
[ῠ], εως, ἡ,
A watching, guarding, ὕπνου φυλάξεις S.Fr.432.9, cf. Aq.Is.26.3. II a security, E.Hel.506 (pl.).
German (Pape)
[Seite 1314] ἡ, Bewachung, Beschützung, Beobachtung; im plur. Soph. frg. 379; ἔχει μοι δισσὰς φυλάξεις Eur. Hel. 513.