Which adjective can be used to describe a person showing "impetuous" behavior?

The adjective "reckless" is appropriate for describing a person exhibiting "impetuous" behavior because both terms relate to acting without careful consideration or forethought. Impetuous behavior is characterized by impulsiveness and a tendency to act swiftly, often leading to hasty decisions. Therefore, someone who is described as reckless similarly engages in activities without weighing the consequences, aligning closely with the nature of being impetuous.

The other adjectives do not convey the same alignment; for instance, "cautious," "thoughtful," and "deliberate" all imply a consideration of risks and a more measured approach to actions, which stands in contrast to the nature of impetuosity.