Johnnie Walker Green Label

Whisky (Scottish Gaelic: uisge-beatha), or whiskey (Irish: uisce beatha or fuisce), refers to a broad category of alcoholic beverages that are distilled from fermented grain mash and aged in wooden casks (generally oak).

Different grains are used for different varieties, including: barley, malted barley, rye, malted rye, wheat, and maize (corn). Whisky derives from the Gaelic word for "water" (uisce or uisge), and is called in full uisge-beatha (in Scotland) or uisce beatha (Ireland), meaning "Water of Life". It is related to the Latin aqua vitae, also meaning "water of life". It is always Scotch whisky (plural: whiskies), and Irish whiskey (whiskeys). (Wikipedia.org)