society > occupation and work > worker > workers according to type of work > manual or industrial worker > producer > makers of containers or receptacles > [noun] > maker of casks or cooper > types of (6)
a cooper who makes wooden vessels for domestic or dairy use; see cooper, n.1 1.
a cooper who makes casks, etc. for dry goods.
(under-, prefix1 affix 3a(a).)
a cooper who makes butts to hold liquids, esp. beer.