Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sō̆rex (o long, Ser. Samm. 4, 57; Poët. in Anthol. Burm. 2, p. 452; o short, Auct. Carm. Phil. 62; Poët. in Anthol. Burm. 2, p. 453), ĭcis, m. [Gr. ὕραξ; root svar-; cf. susurrus], a shrew-mouse, Ter. Eun. 5, 6, 23; Varr. R. R. 2, 4, 12; Col. Arb. 15; Plin. 2, 41, 41, § 109; its noise was of ill omen, id. 8, 57, 82, § 223; Val. Max. 1, 1, 5.