pit

pit (http://definr.com/pit)

     n 1: a sizeable hole (usually in the ground); "they dug a pit to
          bury the body" [syn: cavity]
     2: a concavity in a surface (especially an anatomical
        depression) [syn: fossa]
     3: the hard inner (usually woody) layer of the pericarp of some
        fruits (as peaches or plums or cherries or olives) that
        contains the seed [syn: stone, endocarp]
     4: a trap in the form of a concealed hole [syn: pitfall]
     5: a surface excavation for extracting stone or slate: "a
        British term for `quarry' is `stone pit'" [syn: quarry,
        stone pit]
     6: lowered area in front of a stage where an orchestra
        accompanies the performers [syn: orchestra pit]
     7: a workplace consisting of a coal mine plus all the buildings
        and equipment connected with it [syn: colliery]
     v 1: set into opposition or rivalry; "let them match their best
          athletes against ours"; "pit a chess player against the
          Russian champion"; "He plays his two children off
          against each other" [syn: oppose, match, play off]
     2: mark with a scar; "The skin disease scarred his face
        permanently" [syn: scar, mark, pock]
     3: remove the pits from, as of certain fruit such as peaches
        [syn: stone]