1. impunity /ɪmˈpju:nɪti:/

-- state of being not punished; freedom from punishment, harm, loss, etc.

As a reult of stricter enforcement, speeders are no longer able to break the law with impunity.

由于更为严格的执法力度，超速者再也不可能违法而不受罚了。

 

 

2. ingratitude /ɪnˈgrætju:d/

-- state of being not grateful; ungratefulness; lack of gratitude

Alice refused to let me see her notes, despite the fact that I have always lent her mine. Did you ever hear of such ingratitude?

爱丽丝拒绝让我看她的笔记，尽管我总是把我的借给她。你听过如此忘恩负义的事吗？

 

 

3. illegible /ɪˈledʒəbəl/

-- not legible; not able to be read

I could read most of the signatures, but a few were illegible.

我可以认出大部分的签名，但有一些不好认。

 

 

4. illiterate /ɪˈlɪtərɪt/

-- not literate; unable to read and write; uneducated 

The new nation undertook to teach its illiterate citizens to read and write.

那个新成立的国家着手教不识字的群众读与写。

 

 

5. illogical /ɪˈlɔdʒɪkəl/

-- not logical; not observing the rules of logic (correct reasoning)

It is illogical to vote for a candidate whom you have no faith in.

将选票投给一位你不信任的候选人是不合常理的。

 

 

6. immaculate /ɪˈmækjəlɪt/ 

-- not spotted; absolutely clean; stainless

Nearly every soap manufacturer claims his product will make dirty linens immaculate.

几乎每个肥皂制造商都宣称其产品可以洗净肮脏的亚麻布。

 

 

7. immature /ˌɪməˈtjʊə/

-- not mature; not fully grown or developed

Don't use such baby talk! People will think you are mentally immature.

别说这么孩子气的话！别人会以为你心智未成熟。

 

 

8. inaccessible /ˌɪnækˈsesəbəl/

-- not accessible; not able to be reached; hard to get to 

For most of the year, the Eskimo settlements in northern Quebec are inaccessible, except by air.

一年中大部分的时间，除了乘飞机外，是到不了北魁北克的爱斯基摩居留地的。

 

 

9. incessant /inˈsesnt/

-- not ceasing; continuing without interruption

It is almost impossible to cross our street during the rush hour because of the incessant flow of traffic.

高峰时间车辆川流不息，很难穿过我们那条街。

 

 

10. inflexible /ɪnˈfleksəbəl/

-- not flexible; not easily bent; firm; unyielding

No compromise is possible when both sides remain inflexible.

当双方态度都很强硬时，是不可能达成协议的。

 

 

11. inhospitable /ɪnˈhɔspɪtəbəl/

-- not hositable; not showing kindness to guests and strangers; unfriendly

When the vistors come to our school, we should make them feel at home; otherwise they will think we are inhospitable.

当访客来到我们学校时，应该让他们有宾至如归的感觉，否则他们会认为我们不好客。

 

 

12. insoluble /ɪnˈsɔljəbəl/

-- 1. not soluble; incapable of being solved; unsolvable

2. not capable of being dissolved

Scientists are finding solutions to many problems that up to now were insoluble.

科学家们正在为许多至今尚未解答的问题寻找答案。

Salt dissolves in water, but sand is insoluble.

盐在水中会溶解，而沙子就不溶解。

 

 

13. irreconcilable /[ɪˌrekənˈsaɪləbəl/

-- not reconsilable; not able to be brought into friendly accord

After Romeo and Juliet died, their families, who had been irreconcilable enemies, became friends.

罗密欧与朱丽叶死后，他们原本敌对的家庭变成了朋友。

 

 

14. irrelevant /ɪˈreləvənt/

-- not relevant; not applicable; off the topic; extraneous

Stick to the topic; don't make irrelevant remarks.

紧扣主题，不要说一些不相干的话。

 

 

15. irrevocable /ɪˈrevəkəbəl/

-- not revocable; incapable of being recalled; past recall

When the umpire says you are out, it is useless to argue because his decisin is irrevocable.

裁判说你出局时，争辩是没有用的，因为他的决定不可能撤销。