impulsive

 
Pronunciation: /ɪmˈpʌlsɪv/

adjective

  • 1acting or done without forethought: they’d married as impulsive teenagers he regretted his impulsive offer
  • 2 Physics acting as an impulse: the approaching waves contain an impulsive component

Derivatives

impulsively

adverb

impulsiveness

noun

impulsivity

noun

Origin:

late Middle English (in the sense 'tending to impel'): from French impulsif, -ive or late Latin impulsivus, from Latin impuls- 'driven onwards' (see impulse). impulsive (sense 1) dates from the mid 18th century