The host welcomed the guests with a warm smile. The master of the house greeted the visitors with warmth and hospitality.

household /ˈhaʊshəʊld/ 家庭

The majority of middle class households are characterized by stability and affluence.

humanity/hjuːˈmænəti/ 人类

Crimes against humanity are heinous and unforgivable.

identity /aɪˈdentəti/ 身份

A proof of one’s identity is required for access to certain restricted areas.

impact /ˈɪmpækt/ 撞击

The impact of the meteor was felt for miles around.

图片来源：雅思必备高分词汇40讲

improvement /ɪmˈpruːvmənt/ 改进

The homeowners made several improvements to their house, including updating the kitchen and adding a new bathroom.

incident /ˈɪnsɪdənt/ 事件

The international incident caused tensions to rise between the two countries.

income /ˈɪnkʌm/ 收入

The average monthly income in the city is higher than the national average.

independence /ˌɪndɪˈpendəns/ 独立

The nation gained independence from the colonial power, marking the beginning of a new era.

index /ˈɪndeks/ 索引

I looked up “tumour” in the index to find the relevant page.

infant /ˈɪnfənt/ 婴儿

The infant mortality rate in the rural area is alarmingly high.

influence /ˈɪnfluəns/ 影响

The teacher had a positive influence on the students, instilling a love of learning.

injury /ˈɪndʒəri/ 伤害、损伤

The athlete sustained serious injuries during the accident, but is expected to make a full recovery.

institution /ˌɪnstɪˈtjuːʃn/ 机构

The conservative institution has been a fixture in the community for decades.

instruction /ɪnˈstrʌkʃn/ 指令

The robot followed the instructions to the letter.

insurance /ɪnˈʃʊərəns/ 保险

I purchased insurance to protect myself against theft.

intelligence /ɪnˈtelɪdʒəns/ 智力

The child of high intelligence excelled in school.

intention /ɪnˈtenʃn/ 意图、打算

He had the best of intentions, but things didn't go as planned.

invitation /ˌɪnvɪˈteɪʃn/ 邀请

I received an invitation to a wedding, but had to decline.

invoice /ˈɪnvɔɪs/ 发票

Please provide me with an invoice for the services rendered.

issue /ˈɪʃuː/ 问题

The issue of climate change is a pressing global concern.

jail /dʒeɪl/ 监狱

He was released from jail after serving his sentence.

jar /dʒɑː(r)/ 果酱罐

I opened the jam jar to spread some on my toast.

journal /ˈdʒɜːnl/ 日记

I keep a journal to document my daily life.

justice /ˈdʒʌstɪs/ 正义

We must fight for justice and equality.

kindergarten /ˈkɪndəɡɑːtn/ 幼儿园

My child started kindergarten last year.

kite /kaɪt/ 风筝

It was too windy to fly a kite that day.

labour /ˈleɪbə(r)/ 劳动

The Labour government introduced reforms to improve working conditions.

ladder /ˈlædə(r)/ 梯子

He climbed the ladder to reach the top of the tree.

lamb /læm/ 羔羊

The lamb was roasted to perfection.

landscape/ˈlændskeɪp/风景

The landscape of the national park is breathtaking.

lap/læp/圈

The runner completed two laps around the track.

lawn/lɔːn/草坪

The lawn was mowed to perfection.

layer/ˈleɪə(r)/薄层

The soil had an extremely thin layer of organic matter.

league/liːɡ/联盟

The League of Nations was formed to promote international cooperation.

learning/ˈlɜːnɪŋ/学习

Language learning is a lifelong process.

leisure/ˈleʒə(r)/休闲、娱乐

The leisure center provides a range of activities for guests.

length/leŋkθ/ 长度

The length of the river was measured using a tape measure.

liberty/ˈlɪbəti/自由

The Statue of Liberty stands as a symbol of freedom and democracy.

lid/lɪd/盖子

The lid was tightly closed to prevent spills.