形容词

1. 易冲动的;草率的
If you describe someone as impulsive, you mean that they do things suddenly without thinking about them carefully first.

1. characterized by undue haste and lack of thought or deliberation
(`brainish' is archaic)

e.g. a hotheaded decision
liable to such impulsive acts as hugging strangers
an impetuous display of spending and gambling
madcap escapades

Synonym: hotheadedimpetuousmadcaptearaway(a)brainish

2. determined by chance or impulse or whim rather than by necessity or reason

e.g. a capricious refusal
authoritarian rulers are frequently capricious
the victim of whimsical persecutions

Synonym: capriciouswhimsical

3. having the power of driving or impelling

e.g. a driving personal ambition
the driving force was his innate enthusiasm
an impulsive force

Synonym: driving

4. without forethought

e.g. letting him borrow her car was an impulsive act that she immediately regretted

5. proceeding from natural feeling or impulse without external stimulus

e.g. an impulsive gesture of affection

Synonym: unprompted