bottom

名词 bottom:

1. the lower side of anything
   同义词：underside, undersurface
2. the lowest part of anything
3. the fleshy part of the human body that you sit on
   同义词：buttocks, nates, arse, butt, backside, bum, buns, can, fundament, hindquarters, hind end, keister, posterior, prat, rear, rear end, rump, stern, seat, tail, tail end, tooshie, tush, behind, derriere, fanny, ass
4. the second half of an inning; while the home team is at bat
   同义词：bottom of the inning
5. a depression forming the ground under a body of water
   同义词：bed
6. low-lying alluvial land near a river
   同义词：bottomland
7. a cargo ship
   同义词：freighter, merchantman, merchant ship

动词 bottom:

1. provide with a bottom or a seat
2. strike the ground, as with a ship's bottom
3. come to understand
   同义词：penetrate, fathom

形容词 bottom:

1. situated at the bottom or lowest position
2. the lowest rank

1. She started at the bottom and worked her way up to become manager of the company.
   她从最低的位置干起，通过努力终於当上了公司的经理。
2. He was always bottom of the class in maths.
   他的数学成绩在班上总是垫底。
3. They sent the enemy ship to the bottom of the sea.
   他们把敌舰击沉。

bot.tom

n.Abbr. bot.（名词）缩写 bot.
The deepest or lowest part:
底部：最深或最低的地方：
例句：
the bottom of a well; the bottom of the page.
井底；书页的底部

The underside:
下侧，底面：
例句：
scraped the bottom of the car on a rock.
岩石擦坏了汽车底盘

The supporting part; the base.
基础；基底
The far end or part:
远端，远处：
例句：
at the bottom of the bed.
在床的尽头

The last place, as on a list.
最后部分：名单的最末处
The lowest or least favorable position:
基层职务：最低贱和不令人满意的职务：
例句：
started at the bottom of the corporate hierarchy.
从公司的最基层干起

The basic underlying quality; the source:
起源：根本，基础；来源：
例句：
Let`s get to the bottom of the problem.
让我们回到问题的源头

The solid surface under a body of water.
水底：水下的固体表面
Often bottoms Low-lying alluvial land adjacent to a river.Also called bottomland
常作 bottoms 低洼地，滩地：与河流邻接的低洼冲积地带也作 bottomland

Nautical The part of a ship`s hull below the water line.
【航海】 船底：在水线下的船身部分
A ship; a boat:
船；小艇：
例句：
.English merchants did much of their overseas trade in foreign bottoms.(G.M. Trevelyan)
.英国商人在外国船只中进行大量海外贸易.(G.M.特里维廉)

Often bottoms The trousers or short pants of pajamas.
常作 bottoms 睡裤：长裤或短睡裤
Informal The buttocks.
【非正式用语】 臀部
The seat of a chair.
椅子的座位
Baseball The second or last half of an inning.
【棒球】 下半场：一局中的第二或最后半场
Staying power; stamina. Used of a horse.
耐力；体力。用于指马的耐力
n.attributive.（定语名词）
Often used to modify another noun:
常用于修饰另一名词：
例句：
a bottom drawer; the bottom stair.
底层抽屉；底层楼梯

v.（动词）
bot.tomed,bot.tom.ing,bot.toms
v.tr.（及物动词）
To provide with an underside.
给…装底：用内侧装备
To provide with a foundation.
建立…的基础
To get to the bottom of; fathom.
探测：到达…的底部；探测
v.intr.（不及物动词）
To be or become based or grounded.
做准备：有底基或基础的
To rest on or touch the bottom.
触底：停靠在或接触底部

<常用词组>bottom out
To descend to the lowest point possible, after which only a rise may occur:
跌到谷底：跌到可能的最底点，在其后只有一个回升会发生：
例句：
Sales of personal computers have bottomed out.
个人电脑的销售跌到了最底点

<习惯用语>at bottom
Basically.
根本上
来源：
Middle English botme
中古英语 botme
from Old English botm
源自 古英语 botm

【引伸】
bot.tomer
n.（名词）