Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sēvir or sexvir (in inscrr., where this word most freq. occurs, commonly written with numerals, VI. vir, or ĪĪĪĪĪĪ. VIR), vĭri, m. [sex-vir], a member of a board or college consisting of six men, a sexvir.