sink, verb, /sɪŋk/, past tense sank /sæŋk/ (or sunk /sʌŋk/ American English), past participle sunk /sʌŋk/
1
IN WATER to go down below the surface of water, mud etc OPP float.
to go down below the surface of water, mud, etc.
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.
The passengers were rescued from the boat before it sank.
a sinking ship.
The rock sank to the bottom of the pool.
My foot sank into the deep mud.
She sank up to her knees in the snow.
2
BOAT to damage a ship so badly that it sinks.
to cause (a ship or boat) to go down below the surface of water.
A luxury yacht was sunk in a bomb attack yesterday.
The torpedo sank the ship.
3
MOVE LOWER to move downwards to a lower level.
to move down to a lower position.
The sun was sinking behind the coconut palms.
Her chin sank onto her chest, and she looked despairing.
The sun sank behind the hills.
He sank to his knees and prayed. [=he knelt down and prayed]
She sank back into the cozy chair.
......
5
GET WORSE to gradually get into a worse condition.
sink into
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).
......
16
MONEY to spend a lot of money on something.
sink something in/into something
They sank their entire savings into their house.
