sink1 W3 past tense sank past participle sunk
to go down below the surface of water, mud etc [≠ float]:
Their motorboat struck a rock and began to sink.
The kids watched as the coin sank to the bottom of the pool.
The heavy guns sank up to their barrels in the mud.
to damage a ship so badly that it sinks:
A luxury yacht was sunk in a bomb attack yesterday.
to move downwards to a lower level:
The sun was sinking behind the coconut palms.
Her chin sank onto her chest, and she looked despairing.
to fall down or sit down heavily, especially because you are very tired and weak
sink into/to/down/back etc
She let out a groan and sank into a chair.
He let go of her shoulders and she sank at once to the floor.
Marion sank down on a rock, and wept.
The minister sank to his knees (=he went down into a kneeling position) and prayed.
to gradually get into a worse condition
get worse[intransitive always + adverb/preposition]
They lost all their money and sank into desperate poverty.
The good mood left me and I sank into depression.
The doctor said that the boy was sinking fast (=getting weaker and about to die).
6 also your spirits sink
used to say that you lose hope or confidence:
His heart sank the way it always did when she left him.
She felt desperately tired, and her spirits sank.
to go down in amount or value [= drop; ≠ rise]:
Shares in the company have sunk as low as 620p.
The population of the village sank to just a few families.
if your voice sinks, it becomes very quiet
Her voice sank to a whisper.
the unpleasant feeling that you get when you suddenly realize that something bad is going to happen:
I had a sinking feeling inside as I realized I was going to fail yet again.
to be in a situation where you are certain to fail or have a lot of problems:
If I don't get paid by next week, I'll really be sunk.
11 especially British English also sink like a stone especially American English
if something sinks without trace, it fails quickly or no one pays attention to it:
He made a few records which all sank without trace.
12 also sink to doing something
to be dishonest enough or selfish enough to do something very bad or unfair [= stoop]:
How could he have sunk so low?
to put your teeth or something sharp into someone's flesh, into food etc
use something sharp[transitive]
if you sink something such as a well or part of a building, you dig a hole to put it into the ground:
dig into ground[transitive]
A well was sunk in the back garden, and water could be pumped up into the kitchen.
to succeed or fail without help from anyone else:
They don't give you a lot of guidance - you're just left to sink or swim, really.
to spend a lot of money on something
sink something in/into something
They sank their entire savings into their house.
to put a ball into a hole or basket in games such as golf or basketball
18 British English
to agree to stop arguing and forget about your disagreements, especially in order to unite and oppose someone else:
Nations must sink their differences to achieve greater security.
to drink alcohol, especially in large quantities:
drink[transitive] British English informal
We sank a few pints at the pub first.
sink inphrasal verb
He paused a moment for his words to sink in.
The implications of Labour's defeat were beginning to sink in.