Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
rĕ-mordeo, no perf., rsum, 2, v. a., to bite again; mostly poet., and only in the trop. sense; to vex, torment, disturb: me remorsurum petis, Hor. Epod. 6, 4: praeteritis male admissis peccata remordent, Lucr. 3, 827: animus se forte remordet, id. 4, 1135: quando haec te cura remordet, Verg. A. 1, 261; cf. absol.: si juris materni cura remordet, id. ib. 7, 402: vitia castigata remordent, Juy. 2. 25.
In prose: sin tandem libertatis desiderium remordet animos, Liv. 8, 4, 3.