διαφωνεῖν
From LSJ
περὶ ἀλόγων γραμμῶν καὶ ναστῶν → on incommensurable lines and solids
Greek > English (Woodhouse Verbs Reversed)
(see also διαφωνέω): clash, be at variance, be opposed, be out of harmony with, be out of harmony, clash with, differ in opinion from, differ in opinion, in sound