Other forms: casks
A cask is a wooden barrel, especially for beer or wine. A cask of ale, cask-aged, tap the cask.
Cask ale in Britain is a legally distinct thing: beer that finishes fermenting in the cask and is served without added gas, which is why it must be drunk within days of opening. In whisky the cask is where nearly all the flavour comes from.
1nouncaskA wooden barrel, especially for beer or wine.
“The wine is aged in oak casks for two years before it is bottled.”
cask is a barrel.
Middle French casque names the container, a doublet of casque, a helmet.
Middle French
casque
English, today
cask
From Middle French casque. a doublet of casco and casque.
Etymology from Wiktionary, CC BY-SA