Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
crĕpĭdārĭus, a, um, adj. [crepida], of or pertaining to the sole or sandal: sutor, a sandal-maker, shoemaker, Sempr. Asell. ap. Gell. 13, 21, 8: culter, Gell. ib.