1. 落下，降落，跌落
2. 摔倒，跌倒
3.（价格、数量、水平等较大幅度地）下跌，下降，降低
可数名词：
1. 下跌；跌落；跌倒
2.（数量、水平、价格等的）下降；降低；减少
3.（摔跤或柔道中的）压倒，按倒
4.（雪、岩石等的）降落量
n.
1.[singular]【美】秋天，秋季
2.[singular] 垮台，崩溃；灭亡
3.[singular]（国家、城市等的）陷落，沦陷；战败，败亡
4.[plural] 瀑布 词形变化
- 时态 fell，fallen，falling，falls
- 这两个动词都含有“倒塌”之意。
collapse通常指房屋等突然倒塌。
fall一般指由于失去平衡等原因而倒塌，也可作引申用。 - 这些动词都表示“落下，下降”之意。
descend通常指沿斜线或斜坡下降。
drop指物体从一定高度落下。
fall与drop同义，指突然或猛烈地降落，但fall也可指任何下落，同高度或形式无关。
sink指在空气或水中垂直下降、下沉。
- touch or seem as if touching visually or audibly
- to be given by assignment or distribution
- fall to somebody by assignment or lot
- move in a specified direction
- be inherited by
- fall or flow in a certain way
- decrease in size, extent, or range
- a downward slope or bend
- the time of day immediately following sunset
- a sudden sharp decrease in some quantity
- the act of surrendering (under agreed conditions)
- come under, be classified or included
- fall from clouds
- die, as in battle or in a hunt
- be due
- suffer defeat, failure, or ruin
- yield to temptation or sin
- lose one‘s chastity
- to be given by right or inheritance
- lose office or power
- come into the possession of
- be captured
- slope downward
- descend in free fall under the influence of gravity
- drop oneself to a lower or less erect position
- lose an upright position suddenly
- assume a disappointed or sad expression
- be born, used chiefly of lambs
- come out; issue
- be cast down
- go as if by falling
- occur at a specified time or place
- begin vigorously
- pass suddenly and passively into a state of body or mind
- come as if by falling
- the season when the leaves fall from the trees
- when a wrestler‘s shoulders are forced to the mat
- the lapse of mankind into sinfulness because of the sin of Adam and Eve
- a free and rapid descent by the force of gravity
- a movement downward
- a sudden drop from an upright position
- a lapse into sin; a loss of innocence or of chastity
- move downward and lower, but not necessarily all the way
- a sudden decline in strength or number or importance