| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024im•pe•tus /ˈɪmpɪtəs/USA pronunciation n., pl. -tus•es. - a force that moves one to action;
impulse:[countable]Some children need an impetus to study. - Mechanics the momentum of a moving body:[uncountable]The sled zoomed downhill under its own impetus.
See -pet-. WordReference Random House Unabridged Dictionary of American English © 2024im•pe•tus (im′pi təs),USA pronunciation n., pl. -tus•es. - a moving force;
impulse;
stimulus:The grant for building the opera house gave impetus to the city's cultural life. - Mechanics(broadly) the momentum of a moving body, esp. with reference to the cause of motion.
- Latin: an attack, literally, a rushing into, perh. by haplology from *impetitus (though the expected form would be *impetītus; see appetite), equivalent. to impetī-, variant stem of impetere to attack (im- im-1 + petere to make for, assault) + -tus suffix of verb, verbal action
- 1650–60
- 1.See corresponding entry in Unabridged stimulation, spur, boost.
Collins Concise English Dictionary © HarperCollins Publishers:: impetus /ˈɪmpɪtəs/ n ( pl -tuses)- an impelling movement or force; incentive or impulse; stimulus
- the force that sets a body in motion or that tends to resist changes in a body's motion
Etymology: 17th Century: from Latin: attack, from impetere to assail, from im- (in) + petere to make for, seek out |