καθεῖσε

From LSJ

ἀπορράπτειν τὸ Φιλίππου στόμα ὁλοσχοίνῳ ἀβρόχῳ → sew up Philip's mouth with an unsoaked rush, stop Philip's mouth with an unsoaked rush, shut one's mouth without any trouble

Source

French (Bailly abrégé)

3ᵉ sg. ao. Act. de καθέζω.