sumph

/S AH1 M F/
noun
  1. 1

    A dunce; a blockhead.

noun
  1. 1

    A hollow or pit into which liquid drains, such as a cesspool, cesspit or sink.

  2. 2

    The lowest part of a mineshaft into which water drains.

  3. 3

    A completely flooded cave passage, sometimes passable by diving.

  4. 4

    The crankcase or oil reservoir of an internal combustion engine.

  5. 5

    The pit at the lowest point in a circulating or drainage system (FM 55-501).

  6. 6

    An intentional depression around a drain or scupper that promotes drainage.

Source: https://en.wiktionary.org/wiki/sumph