χαλκοῦν

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)

neutre de χαλκοῦς.

Russian (Dvoretsky)

χαλκοῦν: стяж. n к χάλκεος.