Whisky

google

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early 18th century: abbreviation of obsolete whiskybae, variant of usquebaugh.

wiktionary

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Attested since the early 18th century. Variant of usque, abbreviation of usquebaugh (compare obsolete whiskybae). From Scottish Gaelic uisge-beatha and Irish uisce beatha(“water of life”). Compare aquavit, from Latin aqua vītae(“water of life”).

etymonline

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whisky (n.)

see whiskey.