Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
2. Săburra (Sabbŭra), ae, m., a lieutenant of King Juba, Caes. B. C. 2, 38, 1; 40, 1; 41, 2; Hirt. B. Afr. 95, 1.
Form Sabbŭra, Sil. 15, 441; Luc. 4, 723.