used esp in place names: a headland or peninsula in Scotland Mull of Galloway [Middle English (Scots) mole, prob from Old Norse mūli projecting crag, snout, muzzle]
crumbly soil humus forming a layer on top of mixed organic matter and mineral soil and merging into the underlying mineral soil [German Mull from Danish muld from Old Norse mold dust, soil]
a soft fine sheer fabric of cotton, silk, or rayon [by shortening and alteration from earlier mulmul muslin, from Hindi malmal]