sump

Noun
  1. An oil reservoir in an internal combustion engine (synset 104361465)
    is a type of: reservoir - tank used for collecting and storing a liquid (as water or oil)
  2. A well or other hole in which water has collected (synset 104361365)
    is a type of: well - a deep hole or shaft dug or drilled to obtain water or oil or gas or brine
  3. A covered cistern;
    Waste water and sewage flow into it (synset 103002170)
    is a type of: cistern - an artificial reservoir for storing liquids; especially an underground tank for storing rainwater
    same as: cesspit, cesspool, sink

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