impulsive
/ɪmˈpʌlsɪv/If you describe someone as impulsive, you mean that they do things suddenly without thinking about them carefully first. 易冲动的
adjective [原级] 冲动的;脉冲的
He is too impulsive to be a responsible mayor. 他太容易冲动,无法成为一个可靠的市长。
-puls-
impulsive
adj. 冲动的(impulse+ive)