1.initial a．最初的，初始的(first)

詞根記憶：init（開(kāi)始）+ial--開(kāi)始的--最初的，初始的

派生詞：initially( ad.開(kāi)始，最初)

2.initiate v.開(kāi)始，發(fā)起（to begin）

詞根記憶：init（開(kāi)始）+iate--開(kāi)始，發(fā)起

例：Lark Manufacturing Company initiated a voluntary program for machine operators.

派生詞：initiation(n.開(kāi)始，發(fā)起)：initiative(n.主動(dòng)的行動(dòng)，倡議)

3.injection n．注射(an act or instance of injecting)；注射劑(sth.as a medication) that is injected)

詞根記憶：in（里）+ject(投擲)+ion--向里投--注射

例：Parents are reluctant to subject children to the pain of injections.

同根詞：injector(n．注射器)

4.inland n．內(nèi)陸(the interior part of a country);a．內(nèi)陸的(of or relating to the interior of a country) ;ad.在內(nèi)地(into or toward the interior)

詞根記憶：in（里面）+land(陸地)--在里面的陸地--內(nèi)陸

例：Surveyors marched inland from the coast for thousands of miles.

同根詞：outland(n.邊境地區(qū)；a．外國(guó)的)

5.inlet n．<口>進(jìn)水(an opening for intake)

例：inlet pipe進(jìn)水管

6.inmate n.居民，同住者(any of a group occupying a single place of residence)

詞根記憶：in（里面）+mate(結(jié)伴)--結(jié)伴在里面住的人--同住者

例：Taking high school level courses in prison has less effect on an inmate's subsequent behavior than taking college-level courses does.

同根詞：matey (n．伙伴；a．友好的)

7.innate a．天生的，固有的(inborn, instinctive)

詞根記憶：in（內(nèi)生）+nate(出生)--出生時(shí)帶來(lái)的--天生的

例：an innate defect固有的缺點(diǎn)

派生詞：innately(n．天賦地，天生就有地)

同根詞：natality (n.出生率)

8.innovation n.創(chuàng)新，革新(the introduction of sth. new)

詞根記憶：來(lái)自innovate(v.革新，創(chuàng)新)

例：They differed markedly in their approach to the business aspects of innovation.

派生詞：innovational(a．革新的；富有革新精神的)

同根詞：innovator(n．改革者；創(chuàng)新者)

9.innovative a．革新的(introducing or using new ideas or techniques)

詞根記憶：in（進(jìn)入）+nov(新)+ative(與…有關(guān)的)--進(jìn)入新時(shí)代的--革新的

例：Many customers will abandon their loyalty to older firms as more innovative firms enter the market.

派生詞：innovativeness(n．創(chuàng)新性，創(chuàng)新精神)

同根詞：novelty(n.新奇)