Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. nĭco, ci, 3, v. n. [root gnic-, gnig-; Germ. neigen; cf. conivere (for cognigvere), to close (the eyelids), shut fast; v. also nitor, nixus], to beckon, Plaut. Truc. 2, 7, 63 and 64.