Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
circum-rādo, rāsi, rāsum, ĕre, v. a., to scrape, shave, or pare around: tonsillas digito, Cels. 7, 12, n. 2: dentem, id. ib.: sarmentum circumrasum, Col. 4, 29, 14.