Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
circum-cŏlo, ĕre, v. a., to dwell round about or near: sinum maris, Liv. 5, 33, 10: paludem, id. 31, 41, 4; absol., Dig. 43, 12, 1; cf. ib. 43, 13, 1: Amazones circumcolunt Tanain, Amm. 22, 8, 27: insulam, id. 22, 8, 43.