| insensitive(adjective, dull, rough, low, slow) |
| irrational(adjective, simple, foolish, stupid, crazy) |
| jejune(simple, fresh, innocent, childlike, trusting) |
| nearsighted(adjective, dull, careless, indifferent, thoughtless) |
| not bright(expression, adjective, simple, slow, stupid) |
| oafish(adjective, dull, simple, slow, rude) |
| open(adjective, simple, easy, innocent, real) |
| preoccupied(adjective, unaware) |
| sappy(adjective, unaware) |
| senseless(adjective, simple, slow, silly, foolish) |
| slow(adjective, dull, simple, silly, stupid) |
| stolid(adjective, dull, simple, slow, stupid) |
| strange(adjective, odd, vague, unfamiliar, impractical) |
| superstitious |
| swinish(adjective, dull, rough, low, offensive) |
| thickheaded(slow, stupid) |
| unaccustomed(adjective, new, raw, inept, unfamiliar) |
| unapprized |
| uncalculated(unaware, oblivious) |
| uncivilised |