dē-proelĭor, āri, 1, v. n., only in Part.,
warring violently : ventos aequore fervido Deproeliantes, Hor. Od. 1, 9, 11.
(dē-proelior,) —, ārī, dep.—P. praes., warring violently: ventos aequore Deproeliantīs, H. ...
An Elementary Latin Dictionary