sump

öljykammio

vesikuoppa

saostuskaivo A hollow or pit into which liquid drains, such as a cesspool, cesspit or sink.
The lowest part of a mineshaft into which water drains.
A completely flooded cave passage, sometimes passable by diving.
puhekieltä The crankcase or oil reservoir of an internal combustion engine.
puhekieltä The pit at the lowest point in a circulation circulating or drainage system (FM 55-501).
puhekieltä An intentional depression around a drain or scupper that promotes drainage.
puhekieltä Of a cave passage, to end in a sump, or to fill completely with water on occasion.

We discovered a new passage, but it sumped after 100 metres.

This low passage sumps quickly after moderate rainfall.