firewater

noun4

1. •
   (informal) High-proof alcoholic beverage, especially whiskey (especially in the context of its sale to or consumption by Native Americans).

   • High Jack had been drinking too much rum ever since we landed in Boca. You know how an Indian is—the palefaces fixed his clock when they introduced him to firewater. — 1909
2. •
   Water for use in firefighting.

   • A continuously circulated firewater line supplies a deluge cooling system in each gathering center for fire containment. — 1981
3. •
   High-temperature hydraulic condensate discharged from industrial boilers.
4. •
   (no longer used) Synonym of alkahest.