unthinking

Definitions

Not using one's power of thought; thoughtless or heedless.

Done or acting without due consideration or reflection.

Examples

His unthinking remark caused a great deal of hurt to those around him.

She made an unthinking mistake by deleting the file before saving her progress.

It was an unthinking act of cruelty that he later deeply regretted.

Synonyms

thoughtless inconsiderate heedless impulsive mindless careless negligent

Antonyms

thoughtful considerate mindful deliberate cautious attentive reflective