| native(adjective, natural, instinctive, automatic, inherent) |
| normal(adjective, natural, instinctive, automatic, inherent) |
| regular(adjective, natural, instinctive, automatic, inherent) |
| remiss(adjective, careless, indifferent, foolish, stupid) |
| rooted(adjective, natural, instinctive, automatic, inherent) |
| second-nature(adjective, instinctive, automatic, innate, inherent) |
| silly(adjective, wrong, slight, careless, foolish) |
| typical(adjective, natural, instinctive, automatic, inherent) |
| unconcerned(adjective, sharp, rude, careless, indifferent) |
| undiplomatic(adjective, careless, thoughtless, insensitive, inconsiderate) |
| undiscerning(adjective, careless, indifferent, foolish, stupid) |
| undiscriminating(adjective, casual, unfussy, cursory) |
| unlearned(adjective, natural, instinctive, automatic, inherent) |
| unreasoning(adjective, careless, foolish, stupid, unreasonable) |
| brute(adjective, strong) |
| crazy(adjective, careless, foolish, stupid, unreasonable) |
| cursory(adjective, slight, careless, cold, indifferent) |
| disregardful(adjective, sharp, rude, careless, indifferent) |
| feckless(adjective, careless, careful, thoughtless, rash) |
| foolhardy(adjective, careless, foolish, thoughtless, impulsive) |