Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
reptābundus, a, um, adj. [repto], creeping, crawling (post-Aug.): effusus in voluptates, reptabundus (al. vagabundus) semper atque ebrius, Sen. Vit. Beat. 12.
Trop.: (virtutem) ex intervallo ingenti reptabundus sequar, Sen. Vit. Beat. 18 (dub.; al. ructabundus).