名詞 impetus:

1. a force that moves something along
   同義詞：drift, impulsion
2. the act of applying force suddenly
   同義詞：impulse, impulsion

1. The historic strike gave an enormous impetus to the whole American labor movement.
   這次歷史性的罷工對(duì)整個(gè)美國(guó)的勞工運(yùn)動(dòng)起了很大的推動(dòng)作用。
2. Impetus of a physical object in motion.
   沖力運(yùn)動(dòng)中物體的動(dòng)力
3. The present conflict may provide fresh impetus for peace talk.
   目前的沖突可能會(huì)給和談提供新的推動(dòng)力。

im.pe.tus

n.（名詞）
【復(fù)數(shù)】 im.pe.tus.es
An impelling force; an impulse.
推動(dòng)力；沖力，刺激
The force or energy associated with a moving body.
運(yùn)動(dòng)量：一個(gè)運(yùn)動(dòng)的物體具有的能量或力量

Something that incites; a stimulus.
激勵(lì)物；刺激物
Increased activity in response to a stimulus:
動(dòng)力：對(duì)刺激物反應(yīng)增加的活力：
例句：
The approaching deadline gave impetus to the investigation.
即將到來(lái)的最后期限推動(dòng)了談判

來(lái)源：
Latin
拉丁語(yǔ)
from impetere [to attack]
源自 impetere [攻擊]
in- [against] * see in- 2
in- [反對(duì)] *參見 in-2
petere [to go towards, seek] * see pet-
petere [走向，尋覓] *參見 pet-