| unthrifty(adjective, improvident) |
| unvigilant(adjective, careless, bold, thoughtless, impulsive) |
| unwise(adjective, careless, thoughtless, inconsiderate, imprudent) |
| unwitting(adjective, careless, unconcerned, sloppy, slack) |
| unworried(adjective, feature, state, indifferent, trait) |
| absorbed |
| airheaded(adjective, careless, vague, sloppy, slack) |
| amnemonic(adjective, careless, vague, sloppy, slack) |
| amnesic(adjective, careless, unconcerned, sloppy, slack) |
| annotate |
| any old way(expression, idiom, careless, bold, thoughtless) |
| any way(expression, soft, tolerant, slack, lenient) |
| apathetical(adjective, cold, dead, apathy, passive) |
| approximate |
| approximative |
| asleep at switch(expression, adjective, idiom, adverb, slow) |
| asleep at the switch(expression, adjective, idiom, adverb, careless) |
| asleep on job(soft, careless, tolerant, slack, lenient) |
| asleep on the job(expression, adjective, idiom, careless, sluggish) |
| ataractic |