thoughtless as an adjective:
Showing lack of careful thought.
unendowed with reason,
void of reason;
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embryonic, ... show more
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'.
synonyms: uncaring, unthinking.
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(indifferent) ... show more
Moby thesaurus: absent-minded, airy, apish, arbitrary, artless, asinine, batty, befooled, beguiled, besotted, blank, blankminded, brainless, brash, buffoonish, calm, capricious, careless, casual, cockeyed ... show more.
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