Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
quā̆drŭplor, āri, v. dep. [quadruplus], to be an informer, cheater, trickster, chicaner: neque quadruplari me volo, Plaut. Pers. 1, 2, 10 (al. quadrupulari).