1.inflict v.使…遭受(to cause something unpleasant to be endured)

词根记忆：in（使）+flict(打击)--打击--使…遭受

例：The environmental damage already inflicted on the North Sea is reversible.

同根词：affliction(n.苦难，折磨)：conflict(n.冲突)

2.influenza n.流行性感冒(an acute highly contagious virus disease that is caused by any of three orthomyxo viruses)

记住它的简写形式flu

例：Until now, only injectable vaccines against influenza have been available.

同根词：influence(n．影响力)

3.influx n．流入，汇集（a coming in）

词根记忆：in（向内）+flux(流)--流入

例：Since World War Ⅱ there has been a tremendous influx of federal money into private medical schools.

4.infrared a．红外线的，红外区的(situated outside the visible spectrum at its red end used of radiation having a wavelength between about 700 nanometers and l millimeter)

词根记忆：infra(在下)+red--光谱上在红光下面的光线--红外线的

例：infrared photography红外线照相／，infrared radiation红外辐射

5.infrastructure n．基础设施，公共建设(the system of public works of a country, state, or region)；下部构造(the underlying foundation or basic framework)

词根记忆：infra(在下)+struct(建筑)+ure--建筑下面的结构--基础设施

例：Public products, in addition to infrastructure, include supply systems.

6.infringement n．侵犯(an encroachment or trespass on a right or privilege)；违反( violation)

词根记忆：来自infringe(v.侵犯，违反)

例：Firms' attempts to derive more patents from existing research and development expenditures may have contributed to a decline in infringement suites.

7.infringer n．侵犯人(one that goes against, as of rules or laws)

词根记忆：来自infringe(让侵犯)

例：Federal prosecutors were unlikely to pursue criminal copyright infringers, and offenders were subject to relatively small penalties.

同根词：infringement(n.侵犯；违反)

8. infuse v.(with)灌输(to cause to be permeated with something)

词根记忆：in（进入）+fuse(流)--流进去--灌输

例：Since most textbook writers were New Englanders, the texts were infused with Puritan outlooks(清教徒观点)．

派生词：infusion(n．灌输)

9.ingenious a．聪明的(bright, smart)；创新的(inventive)

联想记忆：in（内在）+gen(产生)+ious--由内产生的--聪明的

注意：ingenuous(a．坦率的，天真的)

例：Your ingenious ideas have saved the company millions of dollars.