heedless

not paying or showing close attention especially for the purpose of avoiding trouble heedless drivers who back out of parking spaces without looking Synonyms careless, incautious, mindless, unguarded, unsafe, unwaryRelated Words bold, impetuous, rash, reckless; inattentive, regardless; blithe, inconsiderate, thoughtless; absentminded, forgetful, unmindful; lax, neglectful, negligent, remiss, slipshod; imprudent, indiscreet, injudicious; inadvertent, unintentional, unplannedNear Antonyms attentive, chary, observant, vigilant, watchful; foresighted, forethoughtful, provident; calculating, scheming, shrewd; considerate, thoughtful; ultracareful, ultracautiousAntonyms alert, cautious, circumspect, gingerly, guarded, heedful, safe, wary