suicida
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
Spanish > Greek
αὐτοφόνος, αὐτόχειρ, αὐτοσφαγής, αὐτοκτόνος, αὐθέντης, αὐτοθάνατος, αὐτοφόνευτος