vi.

（船等）下沉；（日，月）落，没
The sun was sinking in the west.
夕阳西下。
The ship sank.
船沉了。
（面颊等）下陷[（+in）]
（水面）低落，（地面）陷落
His feet sank in the mud.
他的脚陷进烂泥中。
（疲倦地）坐下，倒下；（头，肩等）筋疲力尽地垂下[（+to/into/on）]
She was stunned and sank to the ground.
她被击昏倒在地上。
She fainted and sank to the ground.
她昏倒在地上。
He sank back into the chair.
他筋疲力尽地倒在椅子上。
（声音，风，价格等）降低；减弱；（在视野中）消失[（+to）]
The wind has sunk down.
风已减弱了。
The flames sank down at last.
火势终于减弱了。
堕落；衰微；衰弱；消沉[（+into）]
The old man is sinking fast and won't live much longer.
老人衰弱得很快，活不长久了。
渗透；深入；沉入[（+in/into）]
The rain sank into the dry soil.
雨水渗入干涸的土壤。

vt.

使下沉；使陷入；把……插入
The submarine sank two ships.
潜艇击沉了两艘船。
使下垂
挖掘；刻，雕
The oil workers are sinking a well.
石油工人正在打油井。
降低（声音，名誉等）
投资于……[（+in/into）]
He's sunk a large sum of money into buying a new house.
他把一大笔钱投在买一幢新房子上面。
抑制（激情等）；隐匿（证据等）；摒除（分歧等）
They sank their differences and joined hands in the business.
他们消除了分歧，联合起来一道干。
搞垮，使完蛋

n.[C]

sink in

渗入
If the ink sinks in, it'll be hard to remove the spot from the cloth.
如果墨水渗入布料，就很难把污迹洗去。
被理解；被理会；被听进去
It finally sank in that he had won a Nobel prize.
他终于明白过来他得了诺贝尔奖。
It took a week for it to sink in that his mother had died.
大约过了一个星期，他才明白过来他母亲已经死了。

sink into

sink or swim

同义:

vi.下沉；落没

vi.衰弱；消沉

反义:

vi.,vt.“（使）下沉；落”的反义词

同义参见:

以上来源于：《英汉大辞典》

sink¹

v.

(past sank; past part. sunk)

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.
fail and not be seen or heard of again.
▸cause to fail.

▸conceal or ignore:
they agreed to sink their differences.
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.
(sink in) (of words or facts) become fully understood.
pocket (a ball) in snooker or billiards.
▸Golf hit the ball into the hole with (a putt or other shot).
insert beneath a surface.
▸ (sink something into) cause something sharp to penetrate (a surface).

▸excavate (a well) or bore (a shaft) vertically downwards.
(sink something in/into) put money or energy into.
Brit. informal rapidly consume (an alcoholic drink).

a (or that) sinking feeling
an unpleasant bodily sensation caused by apprehension or dismay.
sink or swim
fail or succeed by one's own efforts.

OE sincan, of Gmc origin.

sink²

n.

a fixed basin with a water supply and outflow pipe.
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.
short for sinkhole.
[as modifier] Brit. denoting a school or housing estate situated in a socially deprived area.