Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
trĭfārĭus, a, um, adj. [τριφάσιος], of three sorts or ways, threefold, triple (postclass.): causa morborum omnium, App. Mag. p. 305, 38: genus, Sol. 27: linguae, Cassiod. Var. 5, 40 med.: vestigia numerorum in corporibus trifaria, Claud. Mam. Stat. An. 3.