1899.in(介)在……之中
It's two o'clock. I'll come in an hour.
现在是两点钟，我一小时后来。

1900.inability(名)无能力
Her inability to pay the rents caused trouble.
她无力付房租引起了麻烦。

1901.inch(名)英寸、身高
His legs are too long for has inches.
就他的身高而言，他的腿太长了。

1902.incident(名)事件；插曲
Were there any exciting incidents during your journey?
你在旅行中有没有发生什么事？

1903.income(名)收入
Half of our income goes on rent.
我们收入的一半都花在租金上面了。

1904.incorrect(形)不正确的
反义词correct
I beg to point out that your facts are incorrect.
恕我指出你所讲的情况不真确。

1905.increase(名)(动)增加
(名):Crimes are on the increase.
犯罪活动不断地增加。
(动):Travel increases one's knowledge of the world.
旅游增进人对份世界的了解。

1906.indeed(副)的确
These problems are indeed difficult ones, but I am sure they can be solved.
这些问题固然是有些困难，但我相信他们能够解决。

1907.indefinite(形)不确定的
He gave me an indefinite answer.
他给我一个含糊其辞的答复。

1908.indirect(形)间接的；曲折的
We went to the house by an indirect road.
我们经过一条曲折的路到了这座房子。

1909.indirectly(副)间接的
I know Linda was only indirectly concerned in what took place.
我知道所发生的事情间接涉及到琳达。

1910.indoor(形)室内的
反义词outdoor
Indoor pools are usually cleaner than outdoor pools.
室内游泳池比室外游泳池要干净些。

1911.indoors(副)在室内
Don't stay indoors since the weather is so fine.
天气这么好，就不要待在室内了。

1912.infamous(形)可耻的、不名誉的
As you dive over this ledge, watch for the infamous Crown of Thorns Sea Star.
当你潜到此处时,要小心臭名昭彰的长刺海星。

1913.influence(名)影响力(动)影响
(名):Listening to music has a calming influence on her.
听音乐对她有一种安心定神的作用。
(动):I don't want to influence you. You must decide for yourself.
我不想影响你，你必须自行决定。

1914.inner(形)内部的、内在的
反义词outer
Good books can enrich man's inner life.
好书可以丰富人的精神世界。

1915.insect(名)昆虫
Insects propagate themselves by means of eggs.
昆虫以产卵繁殖后代。

1916.insecure(形)不安全的
A shortage of military police made the air base insecure.
缺乏武警苦使得空军基地不安全。

1917.inside(介)在……里面(形)内部的
反义词outside
(介):He parked his car inside the gate.
他把车停在大门里面。
(形);He put his socks on inside out.
他把袜子穿反了。

1918.insider(名)内行人
An insider is the one who is in the secret.
内行人就是熟知内幕者。

1919.instead(副)代替、反而
If there is no coal, oil can be used instead.
如果没有煤，可以用石油来代替。

1920.intellect(名)智力、理解力
同义词brain
His opinion is that the intellect of modern man isn't superior.
他认为现代人的智力并不高超。

1921.intelligence(名)智慧；情报
He had the intelligence to put the fire out with a fire extinguisher.
他机灵地用灭火器灭火。

1922.intelligent(形)聪明的
The child made a very intelligent comment.
那孩子做了很有见地的评论。

1923.intend(动)打算
We intend this news report as teaching material for freshmen.
我们打算把这篇新闻报导作为新生教材。

1924.intent(名)意义(形)专心的
(名):The revised edition is to all intents and purposes a new dock.
修订本实际上是一本新书。
(形):I am intent on my work.
我专心于我的工作上。

1925.intention(名)企图、目的
He had made it clear that he had no intentions towards her.
他已表明自己没有向她求婚的意图。

1926.interact(动)互动
He should interact more with his colleagues.
他应该和同事有更多的交流。

1927.interest(动)使感兴趣(名)兴趣；利益
(动):Chemistry interests him.
他对化学感兴趣。
(名):I have lost my interest in English.
我对英文已不感兴趣。

1928.interesting(形)有趣的
Some of the most interesting names came from American Indian languages.
有些最有趣的名字来自美国印第安人的语言。

1929.Internet(名)网络
After you passed the internet test, what happened?
你通过了网上测试以后呢？

1930.interview(动)(名)面试、面谈；会见
(动):Alice has interviewed most of the applicants for the job.
爱丽丝已和大部分申请这份工作的人面谈过了。
(名):Don't be late for your interview.
面试不要迟到了。