西柚不是西游-
瘦的英语是thin。
例句：
She was very thin， almost to the point of emaciation.
她很瘦，几乎到了憔悴的地步。
瘦的英语：thin、slim、slight、lean、slender等等。
其中，lean侧重缺少脂肪，slim指身体的细长、体重轻，slight指身材又瘦又小，slender指身体细长、体态优美。
北境漫步-
1、thin: 瘦。
这应该是用途最广，大家最熟悉的词，比较客观的表示瘦，没有太多的褒义或贬义。
[英][θu026an][美][θu026an]
adj.薄的; 瘦的; 稀少的; 细的;
vt.使瘦; 使淡; 使稀疏;
vi.变薄; 变瘦; 变淡;
adv.稀疏地，微弱地;
第三人称单数：thins
现在进行时：thinning
过去式：thinned
过去分词：thinned
比较级：thinner
最高级：thinnest
例句
1).Mom tells me how thin I look.
妈跟我说我看起来多瘦。
2).You know dance dress are very thin.
你知不知道那些舞衣很薄的。
2、Slim: 苗条、匀称的瘦，不是过于瘦。这是一个女孩子都喜爱的词。“你瘦了”，就可以说“You look slimmer.” To slim down: 瘦下来 Slim waist: 小细腰
3、 Slender:和slim很像，形容苗条、纤细.
但通常也比较高挑
Tall and slender: 高挑、纤细
long slender legs （修长的双腿）大长腿
4、Lean: 精干、有肌肉的瘦
Low body fat, but with muscles
体脂低、但有肌肉
It"s usually the result of careful diet and exercising
是注重饮食、注意运动的结果
Lean meat: 瘦肉 (食用肉)
下面几个词就不那么招人喜欢了：
underweight指人“体重不足，过瘦”
skinny意为“皮包骨头的”
scrawny意为“瘦弱的”
gaunt形容人因生病或持续担心而“消瘦憔悴的”；
emaciated指人因生病或食不果腹而“极为瘦弱的”，如emaciated refugee（瘦弱不堪的难民）；
skeletal “瘦骨嶙峋”
anorexic 意思是“因患厌食症而极度消瘦的”
几句表示“你瘦了”的方法：
You‘ve lost some weight. 你瘦了。
You"ve lost a ton of weight. 你瘦了好多。
you"ve got a lean look today! 你今天看起来很瘦。
瑞瑞爱吃桃-
thin
英 [θu026an] 美 [θu026an]
adj.
薄的;瘦的;细的;稀少的
vt.
使瘦;使淡;使稀疏
vi.
变薄;变瘦;变淡
adv.
稀疏地，微弱地
第三人称单数： thins 现在分词： thinning 过去式： thinned 过去分词： thinned 比较级： thinner 最高级： thinnest
高考考研
牛津词典
adj.
【不规则形式】 thinner, thinnest
薄；细 not thick
1
薄的；细的
having a smaller distance between opposite sides or surfaces than other similar objects or than normal
Cut the vegetables into thin strips.
把菜切成细条。
A number of thin cracks appeared in the wall.
墙上出现了许多细裂缝。
The body was hidden beneath a thin layer of soil.
尸体被埋藏在薄薄的一层土下面。
a thin blouse (= of light cloth)
薄薄的女衬衫
see also paper-thin
note at narrow
瘦 not fat
2
(of a person or part of the body 人或身体部位) (sometimes disapproving) 瘦的
not covered with much flesh
He was tall and thin, with dark hair.
他又高又瘦，满头黑发。
She was looking pale and thin.
她面黄肌瘦。
He is as thin as a rake (= very thin) .
他骨瘦如柴。
thin legs
细腿
毛发 hair
3
稀少的；稀疏的
not growing closely together or in large amounts
thin grey hair
稀疏的花白头发
液体 liquid
4
稀薄的；淡的
containing more liquid than is normal or expected
同义词： runny
The sauce was thin and tasteless.
这酱汁淡而无味。
烟 smoke
5
能见度较高的；稀薄的
fairly easy to see through
They fought their way through where the smoke was thinner.
他们挣扎着从烟雾稀薄的地方逃了出去。
空气 air
6
稀薄的；含氧少的
containing less oxygen than normal
声音 sound
7
(disapproving) 微弱的；尖细的；有气无力的
high and weak
Her thin voice trailed off into silence.
她的声音越来越弱直至毫无声息。
微笑 smile
8
不真心实意的；冷淡的
not sincere or enthusiastic
He gave a thin smile.
他淡然一笑。
光 light
9
微弱的；暗淡的
not very bright
the thin grey light of dawn
浅灰色的晨曦
劣质 poor quality
10
质量差的；空乏的；拙劣的
of poor quality; lacking an important quality
a thin excuse (= one that people are not likely to believe)
站不住脚的借口
Their arguments all sound a little thin to me.
他们的论据我听起来都觉得有点儿缺乏说服力。
【派生词】thinness noun [U]
see also thinly
习语
be skating/walking on thin ice
履薄冰；冒风险
to be taking a risk
disappear, vanish, etc. into thin air
消失得无影无踪；不翼而飞；悄然而逝
to disappear suddenly in a mysterious way
have a thin time (of it)
(BrE, informal) 遇到许多麻烦；过得不顺
to have many problems or difficulties to deal with; to not be successful
out of thin air
凭空；无中生有地
from nowhere or nothing, as if by magic
the thin end of the wedge
(especially BrE) （不好的事物的）端倪，开端
an event or action that is the beginning of sth more serious and/or unpleasant
thin on top
(informal) 头发稀疏；谢顶
without much hair on the head
He"s starting to get a little thin on top (= he"s losing his hair) .
他开始有点谢顶了。
a thin skin
脸皮薄；顾及脸面
the lack of ability to accept criticism, insults, etc. without becoming upset
同义词： sensitive
反义词： a thick skin
see also thin-skinned(1)
thick/thin on the ground
(BrE) 为数众多（或不多）；数目巨大（或微小）；众多（或稀少）
if people or things are thick/thin on the ground , there are a lot/not many of them in a place
Customers are thin on the ground at this time of year.
一年里这个季节顾客很少。
walk/tread a fine/thin line
处于困境（或险境）；如履薄冰；走钢丝
to be in a difficult or dangerous situation where you could easily make a mistake
He was walking a fine line between being funny and being rude.
他想滑稽而不粗鲁，难以把握分寸。
spread yourself too thin
样样都抓哪样都抓不好
to try to do so many different things at the same time that you do not do any of them well
wear thin
开始变弱；变得不受欢迎；变得兴趣索然
to begin to become weaker or less acceptable
These excuses are wearing a little thin (= because we"ve heard them so many times before) .
这些托词让人听得有点儿腻烦。
adv.
【不规则形式】 thinner, thinnest
薄薄地
in a way that produces a thin piece or layer of sth
Don"t spread it too thin.
不要涂得太薄。
I like my bread sliced thin.
我喜欢吃切成薄片的面包。
verb
(-nn-)
液体 liquid
1
[VN] ~ sth (down) (with sth)
（掺水等）使稀薄，使变淡
to make a liquid less thick or strong by adding water or another substance
Thin the paint with water.
用水把颜料调稀。
毛发 of hair
2
变稀疏；变稀少
to become less thick
a middle-aged man with thinning hair
头发逐渐稀少的中年男子
变稀少 become less thick
3
~ (sth) (out)
（使）变稀薄，变稀疏，变少
to become less thick or fewer in number; to make sth less thick or fewer, for example by removing some things or people
[V] The clouds thinned and the moon shone through.
云层渐稀，透出了月光。
The crowd had thinned out and only a few people were left.
人群渐渐散去，只剩下几个人。
[VN] Thin out the seedlings to about 10cm apart.
把秧苗间成相隔10厘米。
tt白-
瘦
（脂肪少; 肉少） thin; emaciated:
be thin in the face;
脸瘦
be sallow and emaciated;
面黄肌瘦
（食用的肉脂肪少） lean:
lean meat
瘦肉
（窄小） tight:
The coat is a bit tight at the waist.
这件上衣腰身瘦了点。
These shoes are too tight for me.
这双鞋我穿太瘦了。
（地力薄; 不肥沃） not fertile; poor:
poor soil and barren land
瘦土薄田
参考有道词典
snjk-
您好，领学网为您解答：
thin 英 [θu026an] 美 [θu026an] adj.薄的;瘦的;细的;稀少的 vt.使瘦;使淡;使稀疏 vi.变薄;变瘦;变淡 adv.稀疏地，微弱地
第三人称单数： thins 现在分词： thinning 过去式： thinned 过去分词： thinned 比较级： thinner 最高级： thinnest
例句：He was a tall, thin man with grey hair
他是个瘦高个，头发灰白。
望采纳！
小菜G-
slim 苗条的；纤细的；单薄的；微薄的，瘦身
一般用来描述身材的，是肥胖fat的反义词，例句：Gorske is slim and obviously has low cholesterol; he eats two Big Macs a day and said he would continue "until I die" . 葛斯克体型苗条，胆固醇也明显不高，他每天吃两个巨无霸汉堡，并且称他到死都会这样做。
thin 薄的；细的；瘦的；稀少的
多用来形容物体的很薄，是thick的反义词，例句： Cut him up in thin slices and grill him on all sides with a dash of lemon juice, olive oil and garlic on it. 把它切成薄片，涂上点儿柠檬汁、橄榄油和大蒜，再把它给烤了。
大鱼炖火锅-
thin
英 [θu026an] 美 [θu026an]
adj. 薄的; 瘦的
max笔记-
hin以中性的方式来描写人的外貌,常同营养、疾病有较多牵连,不含褒贬义; slim描写人的外貌时有瘦得很美的含义,带有褒义; lanky用来描述人又高又瘦,含有幽默的意味
LuckySXyd-
thin
英 [θu026an] 美 [θu026an]
adj.
薄的;瘦的;细的;稀少的
vt.
使瘦;使淡;使稀疏
vi.
变薄;变瘦;变淡
adv.
稀疏地，微弱地
Chen-
如果是不健康的瘦一般用thin
形容女孩子漂亮的瘦纤长的身材用slim或者slender
skinny就是形容极瘦的，如skinny jeans瘦腿牛仔裤
lean一般形容男生很瘦但是又有肌肉，反正是个好词。