How do you spell Cask

Available Definitions:
1)  n. - Same as Casque.
2)  n. - A barrel-shaped vessel made of staves headings, and hoops, usually fitted together so as to hold liquids. It may be larger or smaller than a barrel.
3)  n. - The quantity contained in a cask.
4)  n. - A casket; a small box for jewels.
5)  v. t. - To put into a cask.