sump
Pronunciation:
/sʌmp/noun
Definitions
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.
The crankcase or oil reservoir of an internal combustion engine.
verb
Definitions
Of a cave passage, to end in a sump, or to fill completely with water on occasion.
Example: This low passage sumps quickly after moderate rainfall.