impulsive

Từ điển Oxford Advanced Learner 8th

im·pul·sive BrE [ɪmˈpʌlsɪv] NAmE [ɪmˈpʌlsɪv] adjective
(of people or their behaviour)acting suddenly without thinking carefully about what might happen because of what you are doing
Syn: ↑impetuous, Syn: ↑rash
•an impulsive decision/gesture
•You're so impulsive!
•He has an impulsive nature.
Derived Words: ↑impulsively ▪ ↑impulsiveness

Word Origin:
[impulsive impulsively impulsiveness] late Middle English (in the sense ‘tending to impel’): from French impulsif, -ive or late Latin impulsivus, from Latin impuls- ‘driven onwards’, from impellere, from in- ‘towards’ + pellere ‘to drive’. The current sense dates from the mid 18th cent.

Example Bank:
•He told me not to be impulsive but to think it over.
•It was not wickedness that led him into crime but a cheerfully impulsive nature and a complete lack of reasoning power.
•She has a generous and impulsive nature.

• Từ đồng nghĩa / Synonyms:
  hotheaded, impetuous, madcap, tearaway(a), brainish, capricious, whimsical, driving, unprompted