Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
per-fulcĭo, fulsi, 4, v. a., to prop up, to sustain, support (post-class.): eloquio perfulcire senatum (al. permulcire), Auct. Pan. ad Pis. 86: perfulsit, Not. Tir. p. 117.