I. verb
1.
to become submerged
the overloaded raft sank below the surface
Synonyms: founder, go down, go under, submerge, submerse
Related Word: capsize, overturn, tip (over); dive, plunge; scuttle; shipwreck, wreck
Idioms: go to Davy Jones's locker, go to the bottom, sink like a rock
Contrasted words: come up, rise
Antonyms: float
2.
Synonyms: set 12, decline, dip, go down
3.
Synonyms: deteriorate 1, decline, degenerate, descend, disimprove, disintegrate, retrograde, rot, worsen
Antonyms: rise
4.
Synonyms: stoop 2, descend
5.
Synonyms: lower 3, couch, demit, depress, droop, let down
6.
Synonyms: thrust 2, dig, drive, plunge, ram, run, stab, stick
7.
Synonyms: humble , abase, bemean, cast down, debase, degrade, demean, humiliate, lower
Antonyms: uplift
II. noun
1.
a place marked by a staggering amount of corruption and filth
that area of the city was a sink of vice and crime
Synonyms: Augean stable, cesspit, cesspool, den, pandemonium, Sodom, sty
Related Word: hellhole; fleshpot
Idioms: Alsatian den, den of iniquity, sink of corruption
2.
Synonyms: depression 2, basin, concavity, dip, hollow, sag, sinkage, sinkhole