Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
διεσχίσθησαν they were cut asunder LXX.Ps.35.15
διεσχίσθη cut asunder LXX.Exod.14.21

Liddell-Scott-Jones

διασχίζω (diaschizō) to cut asunder G:V

διασχίζω-σχίζω,

cleave asunder, sever, ἱστία δέ σφιν.. διέσχισεν ἲς ἀνέμοιο [Refs 8th c.BC+]:—passive, to be cloven asunder, νεῦρα διεσχίσθη [Refs 8th c.BC+]; opposed to συγκρίνεσθαι, [Refs 5th c.BC+]; of soldiers, to be separated, parted, [Refs 5th c.BC+]; to be set at variance, διέσχιστο πόλις [Refs 2nd c.AD+] they have a cleft, [Refs 4th c.BC+]