sump
noun /sʌmp/
/sʌmp/
- a hole or hollow area in which liquid waste collects
集水坑；污水池 - (North American English also oil pan)the place under an engine that holds the engine oil
（发动机下面的）集油槽，油底壳
词源Middle English (in the sense ‘marsh’): from Middle Dutch or Low German sump, or (in the mining sense) from German Sumpf; related to swamp.