■ verb ( past sank ; past participle sunk )
1》 go down below the surface of liquid; become submerged.
↘(with reference to a ship) go or cause to go to the bottom of the sea.
2》 fail and not be seen or heard of again.
↘cause to fail.
↘conceal or ignore: they agreed to ~ their differences.
3》 drop downwards.
↘lower oneself or drop down gently.
↘gradually decrease or decline in amount or intensity.
↘lapse or fall into a particular state or condition.
4》 ( ~ in ) (of words or facts) become fully understood.
5》 pocket (a ball) in snooker or billiards.
↘ Golf hit the ball into the hole with (a putt or other shot).
6》 insert beneath a surface.
↘( ~ something into ) cause something sharp to penetrate (a surface).
↘excavate (a well) or bore (a shaft) vertically downwards.
7》 ( ~ something in/into ) put money or energy into.
8》 Brit. informal rapidly consume (an alcoholic drink).
a (or that ) ~ing feeling an unpleasant bodily sensation caused by apprehension or dismay.
~ or swim fail or succeed by one's own efforts.
OE sincan , of Gmc origin.
1》 a fixed basin with a water supply and outflow pipe.
2》 a pool or marsh in which a river's water disappears by evaporation or percolation.
↘ technical a body or process which absorbs or removes energy or a particular component from a system. The opposite of source .
3》 short for ~hole .
4》 [as modifier ] Brit. denoting a school or housing estate situated in a socially deprived area.
ME: from ~ 1 .