Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dis-pŭdet, puduit, ēre, v. impers., to be greatly ashamed (perh. only in foll. passages): alia memorare dispudet, Plaut. Bacch. 3, 3, 77; id. Most. 5, 2, 44; Ter. Eun. 5, 1, 16.
With genit.: non vos tot calumniarum tandem dispudet? App. Mag. 63, p. 315, 8.