nave (n.1)

"main part of a church," the middle part, lengthwise, extending typically from the main entrance to the choir or chancel, 1670s, from Medieval Latin navem (nominative navis) "nave of a church," a special use of Latin navis "ship" (from PIE root *nau- "boat"), on some fancied resemblance in shape.

"hub of a cart-wheel," Middle English, from Old English nafa, nafu, from Proto-Germanic *nabo- (source also of Old Saxon naba, Old Norse nöf, Middle Dutch nave, Dutch naaf, Old High German naba, German Nabe), perhaps connected with the root of navel on notion of centrality (compare Latin umbilicus "navel," also "the end of a roller of a scroll;" Greek omphalos "navel," also "the boss of a shield").