Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
stultĭlŏquus, a, um, adj. [stultusloquor], talking foolishly, babbling (anteand post-class. and very rare): tace stultiloque, Plaut. Pers. 4, 3, 45: ignoratio, Hilar. Trin. 10, 65.