means The small depression (or occasionally protrusion) in the middle of the belly, left where the umbilical cord was attached at birth.

from From Old English 'nafela,' a word with deep Germanic roots and cousins across many languages — related to Old Norse 'nafli,' German 'Nabel,' and ultimately a Proto-Indo-European root '*(o)nobh-' meaning 'navel' or 'hub.' That same ancient root gives us 'nave,' the central block of a wheel from which the spokes radiate — so the body's center and the wheel's center share an unexpected family resemblance, both naming the still point at the heart of the thing.