cooper

Concise Oxford English Dictionary © 2008 Oxford University Press:
cooper/ˈkuːpə(r)/

▶noun a maker or repairer of casks and barrels. ▶verb make or repair (a cask or barrel).

– derivatives
cooperage noun,
coopery noun (pl. cooperies).

– origin ME cowper, from MDu., Mid. Low Ger. kūper, from kūpe ‘tub, vat’, based on L. cupa.