Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
circum-circā, adv., a strengthened circum or circa, all around (cf. the Heb. [??] [??], Vulg. Ezech. 40, 5; the Gr. ἀμφὶ τερί; and our round about—very rare, perh. only in the foll. exs.; and acc. to Serg. ap. Don. p. 1855 P. also in Cato): ubi erat haec defossa, occoepit scalpturire ibi ungulis circumcirca, * Plaut. Aul. 3, 4, 9: coepi regiones circumcirca prospicere, Sulp. ap. Cic. Fam. 4, 5, 4; Auct. B. Hisp. 41; App. M. 11, p. 258, 23; cf. Prisc. p. 989 sq. P.; Serg. ap. Don. 1. 1.; Hand, Turs. II. p. 73.