Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
perrepto, āvi, ātum, 1, v. freq. a. [perrepo], to creep or crawl through: omnes plateas perreptavi, Plaut. Am. 4, 1, 3; so, omnes latebras, id. Rud. 1, 4, 4: perreptavi usque omne oppidum ad portam, Ter. Ad. 4, 6, 3.