sump
n. countablen. a large hole or tank at the bottom of a ship or building that collects water or oil. It is usually the lowest point in the structure.
n. a low-lying tank or pit designed to collect and hold fluids such as water, oil, or fuel. In nautical contexts, it refers to the lowest part of a ship's hull.
The ship's sump collects rainwater from the deck.
The mechanic checked the engine sump for any signs of oil leaks or metal shavings.
During the storm, the bilge pump failed, forcing the crew to manually bail water from the sump to prevent the vessel from taking on too much weight.
From Middle English sompe, either from Middle Dutch somp, sump or Middle Low German sump from Old Saxon sump, from Proto-West Germanic sump, ultimately from Proto-Germanic *sumpaz. Doublet of swamp.