Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fortĭfĭco, āre, v. a. [fortis-facio], to make strong, to strengthen, fortify (postclass.): corpora, Cael. Aur. Tard. 3, 2, 38; 3, 7, 91: dentes (with constringere), id. ib. 2, 4, 78.