σβέσσω

From LSJ

τὸ δὲ ποιεῖν ἄνευ νοῦ ἃ δοκεῖ καὶ σὺ ὁμολογεῖς κακὸν εἶναι: ἢ οὔ → but doing what one thinks fit without intelligence is—as you yourself admit, do you not?—an evil

Source

French (Bailly abrégé)

fut. poét. de σβέννυμι.

Russian (Dvoretsky)

σβέσσω: эп. fut. к σβέννυμι.