"main part of a church," 1673, from Sp. or It. nave, from M.L. navem (nom. navis) "nave of a church," from L. navis "ship" (see naval), on some fancied resemblance in shape.
"hub of a wheel," O.E. nafu, from P.Gmc. *nabo-, perhaps connected with the root of navel (q.v.) on notion of centrality (cf. L. umbilicus "navel," also "the end of a roller of a scroll," Gk. omphalos "navel," also "the boss of a shield").