Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Mezentĭus (not Mezzent-, Mesdent-, Messent-, Mēdient-, or Mēdent-; cf. Rib. in Rhein. Mus. 1857, vol. 12, p. 418 sq.), i, m., a male proper name [of Oscan origin], a tyrant of Cære or Agylla, Liv. 1, 2; Paul. ex Fest. s. v. oscillum, p. 194 Müll.: contemptor divom Mezentius, Verg. A. 7, 648 sq.; cf. Macr. S. 3, 5; and Serv Verg. A. 1, 267; 7, 760; 9, 745.