1.inoculate v.接種；給…預(yù)防注射(to introduce a serum ,a vaccine, or an antigenic substance into, especially to produce or boost immunity to a specific disease)

詞根記憶：in（不）+ ocul（萌芽）+ate--不讓萌芽成長--給…預(yù)防注射

派生詞：inoculation(n．接種，接木)

2.inquisitive a．好奇的(curious)

詞根記憶：in+quisit(詢問)+ive--不斷詢問的--好奇的

例：The tone of the passage is inquisitive.

同根詞：prerequisite(n．先決條件)：inquisition(n.調(diào)查)

3.inscribe v.刻(to engrave)；【數(shù)】使（圖形）內(nèi)接（切）(to draw within another figure so that every vertex of the enclosed figure touches the outer figure)

詞根記憶：in+scribe(寫，刻)--刻

例：Bill gave Susan a ring inscribed with the words "To my best girl".

派生詞：inscription(n．銘刻；題字)

4.inscription n．題詞(the dedication of a book or work of art);銘文(sth. that is inscribed)

詞根記憶：來自inscript (v.碑銘：題字)

例：Stone inscriptions in a form of the Greek alphabet that was definitely used in Cyprus after A.D. 365 were found in Kourion.

同根詞：description(n．描繪)

5.insecticide n.殺蟲劑(a chemical substance used to kill insects)

詞根記憶：insect(昆蟲)+i+cide(殺)--殺昆蟲的東西--殺蟲劑

例：a powerful insecticide一種強(qiáng)效殺蟲劑

同根詞：pesticide(n．殺蟲劑)

6.insert v.插入(to put or thrust in)

詞根記憶：in（進(jìn)入）+sert(插，放)--插進(jìn)去--插入

例：Please insert your credit card into the slot.

同根詞：exsert (v.突出，伸出)；assert(v.斷言)

7.insight n．洞察力，見識(penetration, discernment)

聯(lián)想記憶：in+sight(眼光)--眼光深入--洞察力

例：Life stories provide incidental information as well as significant insights into a way of life.

8.insignificant a.無價值的，無意義的，無用的(lacking meaning or importance, unimportant)

詞根記憶：in（無）+signifi(意味著)+cant--無意義的

例：The scrapping of automobiles causes insignificant amounts of air pollution.

派生詞：insignificantly( ad.無關(guān)緊要地)

同根詞：significant(a．有意義的)

9.insofar as 到…程度；在…范圍內(nèi)(to the degree or extent that)

例：This is the truth insofar as I know it.