διαμάχομαι
Infl. fut. -μαχέσομαι
1. Dep. "to fight or strive with, struggle against", τινι or πρός τινι Hdt., etc.; πρός τι Dem.; δ. μὴ μεταγνῶναι ὑμᾶς "I resist to the uttermost" your change of opinion, Thuc.; δ. τὸ μὴ θανεῖν Eur.
2. "to fight one with another", id=Eur.
3. "to fight it out, contend obstinately", Lat. depugnare, Ar.
4. "to exert oneself greatly", ὅπως τι γένηται Plat.
5. in argument, "to contend or maintain" that.., δ. τι μὴ εἶναι Thuc.; or without μή, Plat.