1.ingenuity n.巧思(imaginative and clever design or construction)；独创性( inventiveness)

联想记忆：in+gen(产生)+uity--能产生很多点子--巧思

例：They surprised us with their ingenuity.

2.ingest v.咽下，吸收(to take in)

词根记忆：in(进入)+gest(运，载)--运入--吸收

例：Newborn mice do not normally ingest any substance other than their mother's milk.

派生词：ingestion(n.吸收，摄取)

同根词：congestion(n.拥挤)；digest(v.消化)

3.ingrained a．根深蒂固的(deep-seated)

词根记忆：in（进入）+grain（木头的纹理）+ed--进入纹理之内--根深蒂固的

例：a deeply ingrained belief一个根深蒂固的信仰

4.ingredient n.成分，要素(element)；（烹调的）配料(something that enters into a com- pound or is a component part of any combination or mixture)

词根记忆：ingr(=integr完整，进入)+edi(吃)+ent--放入食物内的东西--配料

例：Most people agreed that the principal ingredient of a civic education was literacy.//A chef purposely excludes the special ingredient from the recipe of his delicious dessert.

5.inhabit v.居住于，栖居于(to live in, dwell)

词根记忆：in（进入）+habit(居住)--住在里面--居住于

例：The waters the creatures inhabit contain few nutrient resources.

派生词：inhabitant(n．居民；栖息的动物)；uninhabited(a．无人居住的)

6.inhalation n．吸入(the act or an instance of inhaling)

词根记忆：来自inhale(v.吸入)

例：Smoke hoods can prevent their users from inhalation of toxic gases.

同根词：exhale(v.呼气); halitus (n．气息；蒸气)

7.inherent a．固有的，内在的(intrinsic)

词根记忆：in(内在)+her(继承)+ent--天生继承下来的--固有的

注意：coherent(a．粘在一起，一致的)

例：inherent contradictions内在矛盾

派生词：inherently( ad.天性地，固有地)

8.inherit v.遗传(to pass down);继承(to receive from a parent or ancestor by genetic transmission)

词根记忆：in+her(继承)+it--继承

例：inherited illnesses遗传病

派生词：inheritance(n．遗传i遗产)；inherited(at遗传的)

9.inhibit v.阻止(to prohibit)；抑制(to restrain)

词根记忆：in（不）+hibit(拿住)--不让拿住--阻止，抑制

例：Some substances in the tranquilizer(镇定剂)will inhibit fertility.

派生词：inhibitory(a．抑制的)：inhibitor(n.抑制剂)

同根词：exhibit(v.展览)：prohibit(v.阻止)