μασχαλίζω
From LSJ
θοῦ, Κύριε, φυλακὴν τῷ στόµατί µου καὶ θύραν περιοχῆς περὶ τὰ χείλη µου → set a guard over my mouth, Lord; keep watch over the door of my lips | set a guard, O Lord, over my mouth; keep watch over the door of my lips (Psalm 140:3, Septuagint version)
English (LSJ)
A put under the arm-pits: hence, mutilate a corpse, since murderers believed that by cutting off the extremities (nose, ears, etc.), stringing them together, and passing the string round the neck and under the arm-pits of the victim they would avert vengeance, A.Ch.439 (lyr., Pass.), S.El.445 (Pass.), cf. Ar.Byz. ap. Phot., Suid. s.v. μασχαλίσματα, EM118.29, *574.202, etc.