ἀπόσχασις
From LSJ
οὕτως ἐξ ἐχθρῶν αὐτοκτόνα πέμπετο δῶρα, ἐν χάριτος προφάσει μοῖραν ἔχοντα μόρου → thus mutual gifts that bring death were bestowed by enemies, gifts that brought the lot of death in the name of a favor
English (LSJ)
εως, ἡ,
A opening of a vein, Hp.Epid.7.66 (but possibly scarification). II letting go, in an engine, Ph.Bel.74.51.