sink

> sink
(verb)
droop, drop, fall, founder, go down, submerge, subside.
enter, penetrate.
collapse, fail.
decay, decline, decrease, dwindle, give way, languish, lose strength.
engulf, immerse, merge, submerge, submerse.
dig, excavate, scoop out.
abase, bring down, crush, debase, degrade, depress, diminish, lessen, lower, overbear.
destroy, overthrow, overwhelm, reduce, ruin, swamp, waste.

> sink
(noun)
basin, cloaca, drain.