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impulsive

Pronunciation: /ɪmˈpʌlsɪv/

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Definition of impulsive

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
impulsiveness
impulsivity

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