Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Numquampostreddōnĭdes, ae, m. [numquam-post-reddo], who never will return any thing, a comically formed name: Quodsemelarripides Numquampostreddonides, Plaut. Pers. 4, 6, 22 (dub.; al. Numquamposteaeripides, from whom one can never recover any thing, Nevergetagain’s son).