| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | thoughtless |
| Synonyms: | careless, inconsiderate, neglectful, negligent, unthoughtful |
| Main Entry: | delinquent |
| Part of Speech: | adjective |
| Definition: | irresponsible, defaulting |
| Synonyms: | behind, blamable, blameworthy, careless, censurable, criminal, culpable, defaultant, derelict, disregardful, faulty, guilty, lax, neglectful, negligent, offending, overdue, procrastinating, red-handed, remiss, reprehensible, shabby, slack, tardy, unpaid |
| Antonyms: | behaving, careful, responsible |
| Main Entry: | derelict |
| Part of Speech: | adjective |
| Definition: | careless, negligent |
| Synonyms: | behindhand, delinquent, disregardful, irresponsible, lax, regardless, remiss, slack, undependable, unreliable, untrustworthy |
| Antonyms: | careful, caring |
| Main Entry: | heedless |
| Part of Speech: | adjective |
| Definition: | careless |
| Synonyms: | asleep at the switch, daydreaming, disregardful, fast and loose, feckless, foolhardy, goofing off, impetuous, imprudent, inadvertent, inattentive, incautious, inconsiderate, irreflective, neglectful, negligent, oblivious, out to lunch, precipitate, rash, reckless, slapdash, sloppy, thoughtless, uncaring, unmindful, unobservant, unthinking, unwary |
| Antonyms: | attentive, careful, caring, cautious, concerned, heedful, observant, thoughtful |
| Main Entry: | lax |
| Part of Speech: | adjective |
| Definition: | slack, remiss |
| Synonyms: | any way, asleep on job, behindhand, broad, careless, casual, delinquent, derelict, devil-may-care, disregardful, easygoing, flaccid, forgetful, general, imprecise, inaccurate, indefinite, indifferent, inexact, lenient, neglectful, negligent, nonspecific, oblivious, overindulgent, paying no mind, regardless, shapeless, slipshod, sloppy, soft, unmindful, vague, yielding |
| Antonyms: | hard, rigid, strict, tight |
| Main Entry: | neglectful |
| Part of Speech: | adjective |
| Definition: | careless, failing |
| Synonyms: | behindhand, delinquent, derelict, disregardful, heedless, inattentive, indifferent, lax, lazy, negligent, regardless, remiss, slack, thoughtless, uncaring, unmindful |
| Notes: | neglectful means not showing due care or attention, heedless; negligent means marked by insufficient care or attention; negligible means so small as to be meaningless or insignificant |
| Antonyms: | attentive, careful, caring, mindful, successful |
| Main Entry: | negligent |
| Part of Speech: | adjective |
| Definition: | careless, indifferent |
| Synonyms: | asleep at switch, behindhand, cursory, delinquent, derelict, discinct, disregardful, forgetful, heedless, inadvertent, inattentive, inconsiderate, incurious, lax, neglectful, nonchalant, offhand, regardless, remiss, slack, slapdash, slipshod, sloppy*, slovenly, thoughtless, unconcerned, unheedful, unmindful, unthinking |
| Notes: | neglectful means not showing due care or attention, heedless; negligent means marked by insufficient care or attention; negligible means so small as to be meaningless or insignificant |
| Antonyms: | attentive, careful, caring, mindful, successful |
| Main Entry: | oblivious |
| Part of Speech: | adjective |
| Definition: | unaware, ignorant |
| Synonyms: | absent, absentminded, absorbed, abstracted, amnesic, blind*, blundering, careless, deaf, disregardful, distracted, dreamy, forgetful, forgetting, gone, heedless, inattentive, incognizant, inconversant, insensible, neglectful, negligent, not all there, out to lunch, overlooking, preoccupied, regardless, spacey, strung out, unacquainted, unconcerned, unconscious, undiscerning, unfamiliar, uninformed, uninstructed, unknowing, unmindful, unnoticing, unobservant, unrecognizing, unwitting, zonked |
| Notes: | oblivious means lacking all memory or lacking active conscious awareness or knowledge, while obvious means easily perceived or understood |
| Antonyms: | aware, concerned, conscious, mindful, sensitive, understanding |
| Main Entry: | remiss |
| Part of Speech: | adjective |
| Definition: | careless, thoughtless |
| Synonyms: | any old way, any which way, asleep at switch, asleep on job, behindhand, culpable, daydreaming, defaultant, delinquent, derelict, dilatory, disregardful, fainéant, forgetful, heedless, inattentive, indifferent, indolent, lackadaisical, lax, lazy, neglectful, negligent, regardless, slack, slapdash, slipshod, sloppy, slothful, slow, tardy, uninterested, unmindful, woolgathering |
| Antonyms: | careful, mindful, scrupulous, thorough, thoughtful |