Wrack

Rack , rak, n. a term loosely given to various seaweeds, esp. to the Fucaceæ , common on British shores, long valuable as a source of kelp, and utilised as manure: shipwreck: ruin.— adj. Wrack′ful , destructive. [Lit. 'something cast ashore,' A.S. wræc , exile, misery— wrecan , to drive, urge. Wrack is a doublet of wreck .]