1.illustrate v.举例说明(to demonstrate)

词根记忆：iI（加强）+lustr(清晰)+ate--为使…更清晰--举例说明

例：A specific example is presented to illustrate the main elements of the argument.

派生词：illustration(n．说明；插图)

2.illustration n．说明(the action of illustrating)；例证：图解（sth. that serves to illustrate）

词根记忆：来自illustrate(讥举例：阐明)

例：In her book illustrations, which she carefully coordinated with her narratives, Beatrix Potter capitalized on her keen observation and love of the natural world.

3.imbalance n.不平衡(a lack of balance or state of disequilibrium)；不安定(a lack of stability)

词根记忆：im(不)+balance(平衡)-不平衡

例：It is not likely that the competitive imbalance that now exists between Japan and all major industrial nations will be redressed during the foreseeable future.

派生词：imbalanced(a．不平衡的：比例失调的)

4.imitate v.模仿(to mimic)；仿造(to reproduce)

词根记忆：im(使成…)+it+ate --使成…样子--模仿，仿造

例：Anne imitated the famous artist's st3tle in her own paintings.

派生词：imitation(n．模仿；仿制品)：imitative(a．模仿的)

5.imitative a．模仿的( inclined to imitate)；仿制的(imitating sth. superior)

词根记忆：来自imitate(矿模仿：仿造)

例：He's an imitative artist, who does very little original stuff.

同根词：imitator(n．模仿者)

6.immigration n.外来移民：移居(to come into a country of which one is not a native for permanent residence)

词根记忆：来自immigrate(v.移入，移居)

例：This immigration has continued and even increased.

同根词：emigrate(v.移居国外)

7.immobilize v.使固定，使不动(to make immobile)；使停止流通(to withhold( money or capital) from circulation)

词根记忆：im(不)+mobil(运动的)+ize(使…)--使不动

例：Putting a collar on a rhinoceros involves immatn7izing the animal by shooting it with a tranquilizer dart.

8.immune a．免疫的(having resistance to a disease)

例：immune system免疫系统

派生词：immunity(n.免疫力，免疫性)；immunology(n.免疫学)

9.impact n.碰撞(strike)：影响（a significant or major effect）

词根记忆：im(加以…)+pact(压)--加以压力--碰撞

例：It is believed that the extinction of the dinosaurs was caused by the asteroid impact on earth.//Researchers analyzed the negative economic impact of downsizing on firms.