sink2

noun

• 1a fixed basin with a water supply and a drain.

• 2a pool or marsh in which a river’s water disappears by evaporation or percolation.
• technical a body or process that acts to absorb or remove energy or a particular component from a system:a heat sink the oceans can act as a sink for CO₂The opposite of source.

• 3short for sinkhole.

• 4a place of vice or corruption:moralizers complain that the Net is simply a festering sink of iniquity