1.imply v.暗示，暗指(to hint)

联想记忆：im(进入)+ply(重叠)--重叠表达--暗示，暗指

例：The look of guilt on John's face implied that he committed the crime.

2.impose v. (on/upon）征（税等）(to levy)；处以（罚款、监禁等）：强制实行：强加于 (to establish or bring about as if by force)

词根记忆：im(使…)+pose(放)--强行放置--强加于

例：The government decided to impose restaurant meal tax．//impose penalties施以惩罚 //The national speed limit of 55 miles per hour was imposed in 1974.

派生词：imposing(a．使人难忘的，壮丽的)；imposition(n．征税；强加)

同根词：dispose(v.布置，处理)

3.imposition v.征收(sth. imposed)；强加(the act of imposing)

词根记忆：im(使…)+pos(放置)+ition--强行放置--强加

例：The imposition of quotas limiting imported steel will not help the big American steel mills.

同根词：imposture(n.欺诈；冒牌)

4.impoverished a．穷困的(poor)

词根记忆：来自impoverish（v.使贫穷）

例：Both private and public hospitals provided mainly food and shelter for the impoverished sick.

5.impulse n.冲动(a sudden spontaneous inclination);脉冲(a surge of electrical power in one direction)

词根记忆：im(使…)+puls(推)+e--推动--冲动

例：electrical impulse电脉坤 //impulses to kill杀人冲动

同根词：repulse(v.打退：厌恶)

6.in lieu of 代替(instead of)

例：They used an inked thumbprint in lieu of signature.

7.inability n.无才能，无能力（lack of ability（especially mental ability）to do sth.）

词根记忆：in（无）+ability(能力)--无能力

例：A major impediment to wide acceptance of electric vehicles even on the part of people who use their cars almost exclusively for commuting is the inability to use electric vehicles for occasional extended trips.

同根词：ability (n．才能;能力)

8.inaccessible a．难达到的，难接近的，难达到的(not accessible)

例：The plant generally grows in largely inaccessible places.

派生词：inaccessibly( ad.难接近地)

9.inaccurate a．错误的(wrong)；不准确的(not accurate)

词根记忆：in（非）+accurate(精确的)--非精确的--错误的

例：The methods used to determine the gold content of Frobisher's samples must have been inaccurate.

派生词：inaccurately( ad.不准确地；不精确地)；inaccuracy(n．错误)