ἀπόκτανσις

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

Spanish (DGE)

-εως, ἡ
asesinato ἥμαρτε ἡ Μήδεια περὶ τὴν τῶν παίδων ἀποσκευὴν ἤτοι ἀπόκτανσιν Anon.in Rh.146.1.