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

詞根記憶：in（使）+flict(打擊)--打擊--使…遭受

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

同根詞：affliction(n.苦難，折磨)：conflict(n.沖突)

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

記住它的簡寫形式flu

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

同根詞：influence(n．影響力)

3.influx n．流入，匯集（a coming in）

詞根記憶：in（向內）+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．紅外線的，紅外區的(situated outside the visible spectrum at its red end used of radiation having a wavelength between about 700 nanometers and l millimeter)

詞根記憶：infra(在下)+red--光譜上在紅光下面的光線--紅外線的

例：infrared photography紅外線照相／，infrared radiation紅外輻射

5.infrastructure n．基礎設施，公共建設(the system of public works of a country, state, or region)；下部構造(the underlying foundation or basic framework)

詞根記憶：infra(在下)+struct(建筑)+ure--建筑下面的結構--基礎設施

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

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

詞根記憶：來自infringe(v.侵犯，違反)

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)

詞根記憶：來自infringe(讓侵犯)

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

同根詞：infringement(n.侵犯；違反)

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

詞根記憶：in（進入）+fuse(流)--流進去--灌輸

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

派生詞：infusion(n．灌輸)

9.ingenious a．聰明的(bright, smart)；創新的(inventive)

聯想記憶：in（內在）+gen(產生)+ious--由內產生的--聰明的

注意：ingenuous(a．坦率的，天真的)

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