ἀποσχίζω

A. split, cleave off, ἀπὸ δ’ ἔσχισεν αὐτήν [τὴν πέτρην] Od. 4.507; tear off, E. Alc. 172, Opp. H. 2.623.

2. sever, detach from, τινὰ ἀπὸ τοῦ συμμαχικοῦ Hdt. 6.9; ἀ. Αυδούς part them off, separate them, Pl. Plt. 262e; τὴν ἰδίαν ψυχὴν τῆς τῶν λογικῶν M.Ant. 4.29:— Pass., ἀποσχισθῆναι ἀπό . ., of a river being parted from the main stream, Hdt. 2.17, 4.56; of a tribe detached from its parent stock, Id. 1.58,143; ἀπὸ τῆς μεγάλης φλεβὸς ‐σχίζεται Arist. HA 514b10: c. gen., ἀποσχισθέντες τῆς ἄλλης στρατιῆς Hdt. 8.35, cf. 7.233, Pl. Plt. 267b, etc.:—Med., separate oneself, Id. Lg. 728b; τοῦ σοφιστοῦ Lib. Or. 3.24.

3. metaph., ἀ. τινὰ τοῦ λόγου cut him off from his speech, interrupt him in it, Ar. Nu. 1408.