Question

67. pel, puls [L]=

Accepted Answer

to drive, to push 逐使，推动
compel 和compulsion 或compulsive 虽然词干不一样，单词的基本含义却是一致的。这是因
为它们的词根pel 和puls 是一对同源异形根。pel 来自拉丁动词pellere 的不定式词干pell；
puls 则是该动词的动名词词干。词根的意思相当于to drive（逐使）或to push（推动）。这
对异形根构词很有规律：pel 加上前缀构成动词；plus 则构成相应的名词和形容词。

compel [com-表加强词义，pel=to drive 逐使→“to drive (somebody into doing something)驱使
（某人干某事）”→] v. urge forcefully;require by force 迫使；强求：His conscience compelled him
to tell the truth.良心迫使他说出了实话。

▽compellable [compel(l);-able a.] a.可强迫的
compulsion [compel 的对应名词：compuls=to compel 迫使；-ion n.=the act or state 表行为或
状态→] n. force 强制，强迫：under compulsion 被迫的

▽compulsive [com-;puls;-ive a.] a.强迫的
compulsory [com-;puls;-ory a.] a.强制性的；义务的

repel [re-=back 回；pel=to drive or push 逐，推→] v.① drive or push back 逐回；击退：to repel
the enemy's attack 击退敌人的进攻②push or keep away 排斥；防，抗：This coat will repel water.
这外套不透水。

▽repellent [repel(l);-ent a.] a.击退的；排斥的
repellency/repellence [repel(l);-ency/-ence n.] n.抵抗性；排斥性

repulse [re-=back 回；puls=to drive or push 逐，推；-e→]Ⅰv.① drive back 击退：to repulse the
enemy 击退敌人② push, away, or refuse coldly 排斥；严拒：to repulse an invitation 不接受邀
请→Ⅱn.① driving back 击退：The enemy met with a repulse.敌人被击退。② refusal 严拒：
Her repulse was to be expected.她的拒绝乃意料中的事。

▽repulsion [repuls(e) v.;-ion n.] n.排斥；严拒
repulsive [repuls(e) v.;-ive a.] a.排斥的；严拒的

expel [ex-=out 出；pel =to drive 逐→] v.① drive out 驱出：A foreign secret agent was expelled
from the country.一个外国间谍被驱逐出境。② dismiss in disgrace 开除：The boy was expelled
from school.那男生被学校开除了。

▽expellant/expellent [expel(l);-ant/-ent a.] a.驱除的
expulsion [ex-;puls;-ion n.] n.驱逐；开除
expulsive [ex-;plus;-ive a.] a.逐出的；开除的

impel [im-(in-)=on 上，前；pel=to drive or push 逐，推→] v. drive or push on;urge on 推动；激
励：His desire for knowledge impelled him to study hard.求知欲望推动他努力学习。

▽impellent [impel(l);-ent a.] a.推动的；推进的
impulse [im-;puls;-e] n.冲动；刺激
impulsion [im-;puls;-ion n.] n.推动；推动力；刺激
impulsive [im-;puls;-ive a.] a.冲动的；由冲动所造成的

propel [pro-=forward 向前；pel=to drive or push 逐，推→] v. drive or push forward 推动；推进：
The ship is propelled by steam.那条船是靠蒸汽推进的。

▽propellant/propellent [propel(l);-ant/-ent a.] a.推进的
propulsion [pro-;puls;-ion n.] n.推进；推进力
propulsive [pro-;puls;-ive a.] a.推进的；有推进力的

dispel [dis-=away 离开；pel=to drive 驱逐→] v.① drive away and scatter 驱散：The sun dispelled
the thick fog. 太阳驱散了浓雾。② send away, remove 消除；消释：His words dispelled my
doubts.他的话消除了我的疑虑。

Drive Push N Repulse Compel V Repel 逐，推→