impulsive
adj.doing things suddenly without thinking about what might happen next. You use this to describe someone who acts on their feelings right away.
adj.acting or done without forethought or consideration of the consequences. Often used to describe personality traits or specific spontaneous actions.
“He made an impulsive decision to buy the expensive car.”
“She regretted her impulsive comment as soon as she saw the hurt look on her friend's face.”
“While some admire his spontaneous nature, others find his impulsive habit of quitting jobs without a backup plan to be deeply irresponsible.”
Often follows linking verbs like 'be', 'seem', or 'become'.
While 'in an impulsive way' is grammatically correct, learners often over-rely on this phrase instead of using the more natural adverb form 'impulsively'.
“Adding fuel to Canadians’ financial fire is the growing economic trend of “doom-spending” — impulsive, stress-driven purchases of non-essentials by those left feeling hopeless about their financial futures.”
“Estiarte continues: “I said to the team: ‘Please, you have to understand, you’re not playing with a coach who can be a bit impulsive, intense, sometimes a bit up and down.”
Borrowed from Middle French impulsif, from Latin impulsivus.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.