sink

Noun

• a covered cistern; waste water and sewage flow into it

• a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof

• (technology) a process that acts to absorb or remove energy or a substance from a system
  • the ocean is a sink for carbon dioxide
    

• plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe

Verb

• embed deeply
  • She sank her fingers into the soft sand
    
  • He buried his head in her lap
    

• fall or sink heavily
  • He slumped onto the couch
    
  • My spirits sank
    

• fall heavily or suddenly; decline markedly
  • The real estate market fell off
    

• appear to move downward
  • The sun dipped below the horizon
    
  • The setting sun sank below the tree line
    

• descend into or as if into some soft substance or place
  • He sank into bed
    
  • She subsided into the chair
    

• go under, "The raft sank and its occupants drowned"

• pass into a specified state or condition
  • He sank into nirvana
    

• cause to sink
  • The Japanese sank American ships in Pearl Harbor
    

• fall or descend to a lower place or level
  • He sank to his knees
    

Related words

• Synonyms: 
  cesspool , cesspit , sump , sinkhole , swallow hole , bury , slump , slide down , fall off , dip , subside , settle , go down , go under , pass , lapse , drop , drop down
• Antonyms: 
  source , float , swim