Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prō-dormĭo, īvi or ĭi, 4, v. n., to sleep before (post-Aug.): sive prodormias, sive pervigiles, Front. Ep. ad M. Caes. 1, 4 Mai; so id. ib. 4, 6; 5, 22.