characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; (`brainish' is archaic)過度の急性と思案または熟考の不足によって特徴づけられる衝動的
例:liable to such impulsive acts as hugging strangers 見知らぬ人に抱きつくといったような衝動行為をしがちである
proceeding from natural feeling or impulse without external stimulus; "an impulsive gesture of affection"自然な感情または衝動から発生し、外部刺激を伴わない衝動的
例:an impulsive gesture of affection 衝動的な愛情の意思表示
without forethought; "letting him borrow her car was an impulsive act that she immediately regretted"事前に見通しをたてずに衝動的
例:letting him borrow her car was an impulsive act that she immediately regretted 彼に彼女の車を貸したのは、衝動的な行為であったと彼女はすぐに後悔した
determined by chance or impulse or whim rather than by necessity or reason; "a capricious refusal"; "authoritarian rulers are frequently capricious"; "the victim of whimsical persecutions"必要性や論理によるよりも偶然、衝動または気まぐれによって決定される気まぐれ