Adjective unthinking has 3 senses
- unreflective, unthinking, unthoughtful - not exhibiting or characterized by careful thought
Antonym: thoughtful (indirect, via thoughtless)
- thoughtless, uncaring, unthinking - without care or thought for others; "the thoughtless saying of a great princess on being informed that the people had no bread; `Let them eat cake'"
Antonym: considerate (indirect, via inconsiderate)
- lumpish, lumpen, unthinking - mentally sluggish
Antonym: smart (indirect, via stupid)
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Adverbial unthinking has 1 sense
- thoughtlessly, unthinkingly, unthinking - in a thoughtless manner; "he stared thoughtlessly at the picture"
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