From French eau-de-vie (“water of life”), calque of Medieval Latin aqua vītae. Compare akvavit, aquavit, aqua vitae, whisky, whiskey, and water of life from the same source.
eau de vie (countable and uncountable, plural eau de vies or eaus de vie or eaux de vie)
Unadapted borrowing from French eau-de-vie (“water of life”), from Medieval Latin aqua vītae.