ἀδελφοκτονία
From LSJ
ἐγὼ δὲ λέγω ὑμῖν ὅτι πᾶς ὁ βλέπων γυναῖκα πρὸς τὸ ἐπιθυμῆσαι αὐτὴν ἤδη ἐμοίχευσεν αὐτὴν ἐν τῇ καρδίᾳ αὐτοῦ → But I am telling you that anyone who looks at a woman to the extent of lusting after her has already committed adultery with her in his heart (Matthew 5:28)
English (LSJ)
ἡ,
A murder of a brother or sister, J.BJ1.31.2, Ph. 1.210, al.