ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)
dissidium: a false reading for discidium, q. v., and cf. Madv. ad Cic. Fin. Exc. II. p. 812 sq.
dissĭdĭum, ĭī, n. (dissideo), séparation, division : Ambr. Luc. 7, 135 ; Hier. Jovin. 1, 11.