Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fortĭcŭlus, a, um, adj. dim. [id.], somewhat bold, brave, or resolute (very rare): quamvis idem (Epicurus) forticulum se in torminibus praebeat, * Cic. Tusc. 2, 19, 45; App. M. 8, p. 212, 32: carmina, Aus. Idyll. 3 fin.