fire hole (firhol)
The Century Dictionary and Cyclopedia · 1897 · p. 59
A hole cut through the ice near a camp or a ship which has been frozen in, for the purpose of drawing water to extinguish any accidental fire. The crew. had been employed in their ordinary daily duties, such as cleaning decks, keeping the fire - hole open, procuring ice, and other like work. C. F. Hall, Polar Exp., p. 217.
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