διαστᾰσῐάζω · diastasiazō — LSJ
form into separate factions, πάντας Arist. Pol. 1303b26; τοὺς ἐποίκους . . πρὸς τοὺς εὐπόρους ib. 1306a3; τὸ πλῆθος, τὴν πόλιν, J. BJ 1.11.5, Plu. Cam. 36; set at variance, σῶμα καὶ ψυχήν J. BJ 3.8.5.
to be at variance, πρὸς σφᾶς, πρὸς ἀλλήλους, Plb. 1.82.4, etc.; τινί D.C. 54.17; τοῖς ἀληθέσι Iamb. Myst. 9.4: abs., ib. 4.9.