Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vĭrāgo, ĭnis, f. [virgo], a man-like, vigorous, heroic maiden, a female warrior, heroine, virago (poet. and in post-Aug. prose): virago aliqua ancilla, i. e. vigorous, stout, Plaut. Merc. 2, 3, 79: vos etenim juvenes animum geritis muliebrem, Illa virago viri, Poët. ap. Cic. Off. 1, 18, 61: virago Paluda, i. e. Minerva, Enn. ap. Varr. L. L. 7, § 37 Müll. (Ann. v. 510 Vahl.); so Ov. M. 2, 765; 6, 130; Stat. S. 4, 5, 23; id. Th. 11, 414; of Diana, Sen. Hippcl. 54; of Juturna, Verg. A. 12, 468; of an Amazon, Lact. 1, 9, 2; of Eve, Vulg. Gen. 2, 23.