1.initial a．最初的，初始的(first)

词根记忆：init（开始）+ial--开始的--最初的，初始的

派生词：initially( ad.开始，最初)

2.initiate v.开始，发起（to begin）

词根记忆：init（开始）+iate--开始，发起

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

派生词：initiation(n.开始，发起)：initiative(n.主动的行动，倡议)

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

词根记忆：in（里）+ject(投掷)+ion--向里投--注射

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

同根词：injector(n．注射器)

4.inland n．内陆(the interior part of a country);a．内陆的(of or relating to the interior of a country) ;ad.在内地(into or toward the interior)

词根记忆：in（里面）+land(陆地)--在里面的陆地--内陆

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

同根词：outland(n.边境地区；a．外国的)

5.inlet n．<口>进水(an opening for intake)

例：inlet pipe进水管

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

词根记忆：in（里面）+mate(结伴)--结伴在里面住的人--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.

同根词：matey (n．伙伴；a．友好的)

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

词根记忆：in（内生）+nate(出生)--出生时带来的--天生的

例：an innate defect固有的缺点

派生词：innately(n．天赋地，天生就有地)

同根词：natality (n.出生率)

8.innovation n.创新，革新(the introduction of sth. new)

词根记忆：来自innovate(v.革新，创新)

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

派生词：innovational(a．革新的；富有革新精神的)

同根词：innovator(n．改革者；创新者)

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

词根记忆：in（进入）+nov(新)+ative(与…有关的)--进入新时代的--革新的

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

派生词：innovativeness(n．创新性，创新精神)

同根词：novelty(n.新奇)