| inefficient |
| insubstantial(adjective, light, slight, easy, thin) |
| insufficient(adjective, weak, slight, gentle, failure) |
| inutile(adjective, poor, base, inferior, insignificant) |
| marginal(adjective, slight, small, unimportant, trivial) |
| meager(adjective, mean, light, slight, easy) |
| mediocre(adjective, reasonable, poor, sensible, base) |
| miniature |
| moderate(adjective, weak, soft, reasonable, gentle) |
| penny-ante(adjective, insignificant, unimportant, trivial) |
| picayunish |
| puerile |
| scanty(adjective, weak, soft, slight, gentle) |
| silly(adjective, wrong, slight, small, foolish) |
| subsidiary(adjective, light, slight, low, small) |
| trashy(adjective, poor, base, inferior, insignificant) |
| two-bit(adjective, light, slight, small, insignificant) |
| unnecessary(adjective, slight, lower, value, stupid) |
| unproductive(adjective, poor, base, stupid, inferior) |
| unprofitable(adjective, poor, base, stupid, inferior) |