unthinking

Not taking due thought; thoughtless or heedless.

Exhibiting a lack of thought.

Incapable of the power of thought.

Not thinking; heedless; without thought or care; thoughtless; inconsiderate: as, unthinking youth.

Not indicating thought or reflection; thoughtless.

Not thinking; not heedful; thoughtless; inconsiderate.

Not indicating thought or reflection; thoughtless.

Without proper thought; thoughtless.

Showing no regard; careless or unconcerned.

Present participle of unthink.