UNTHINKING

adj. 1 thoughtless, mindless, undiscriminating, unconsidered, unwitting, unreflecting, unthoughtful, irrational, unreasonable, illogical, unperceptive, unperceiving, undiscerning, witless, brainless, foolish, senseless, nonsensical, rash, stupid, silly, mad, crazy, insane, idiotic, moronic, imbecilic, hasty, short-sighted It was unthinking of me to ask her mother to go out to dinner with us 2 inconsiderate, impolite, tactless, rude, thoughtless, undiplomatic, discourteous, uncivil, imprudent, unwise, indiscreet, neglectful On the other hand, it would have been unthinking of me not to ask her mother