acting or done without forethought 冲动的,没有事先考虑的 they had married as young impulsive teenagers. 他们还是年轻冲动的十几岁少年时就结婚了。 perhaps he's regretting his impulsive offer. 或许他正后悔他未经考虑的提议。
late Middle English (in the sense 'tending to impel'): from French impulsif, -ive or late Latin impulsivus, from Latin impuls- 'driven onwards' (see impulse). Sense 1 dates from the mid 18th cent