Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prae-corrumpo, no perf., ruptum, 3, v. a., to corrupt or bribe beforehand (Ovid.): aliquem donis, Ov. M. 14, 134: illa praecorrupta, id. ib. 9, 295.