(a) a furnace; the part of a furnace or boiler in which the fire is lit; (b) (in the context of sea expeditions in freezing conditions) a hole made…

a tap or valve regulating the supply of water to the site of a fire.

(a) a fire hydrant; (b) colloquial (originally and chiefly Sport) a short, stocky person.

a barrel of water provided as a fire precaution on board ship.

Water reserved or used for firefighting. Chiefly attributive.