Lewis & Short

armĭ-pŏtens, pŏtentis, adj. [arma-potens], powerful in arms, valiant, warlike; a poet. epithet of Mars, Diana, etc.: Mavors, Lucr. 1, 32 sq.: Mars, Verg. A. 9, 717: diva, id. ib. 2, 425: Deiphobus, id. ib. 6, 500: genitor, Claud. VI. Cons. Hon. 655: Ausonia, Stat. S. 3, 2, 20: Syria, Dig. 50, 15, 1.