Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sentĭcōsus, a, um, adj. [sentis], full of briers or thorns, thorny, briery (ante- and post-class.); trop.: verba, Afr. ap. Fest. s. v. sentes, p. 339 Müll.: merces (with aspera), App. Flor. p. 361, 1.