Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ruspor, āri, v. dep. n., to search through, examine, explore: crebro quaerere, Fest. p. 264 Müll.: scrutari, Non. 166, 19 (anteclass.): ut latebras ruspans rimarem, Poët. ap. Fest. p. 265 Müll. (Trag. Rel. p. 209 Rib.); cf.: vagent ruspantes silvas, Att. ap. Non. 166, 20: jube nunc animo ruspari Phrygas, id. ib. 19.