| unchangeable(adjective, continuous) |
| unchanged(adjective, same, uniformity, permanence) |
| unexceptional(adjective, everyday, dull, simple, reasonable) |
| unglamourous |
| universal(adjective, regular) |
| unrelieved(adjective, dull, set, boring, constant) |
| weak(adjective, dull, plain, dark, mild) |
| weariful(adjective, dull, simple, excite, boring) |
| automatic(adjective, cold, useful, fixed, powered) |
| bromidic(adjective, dull, simple, stupid, boring) |
| deadly(adjective, dull, dry, boring, tedious) |
| direct |
| discouraging(adjective, dull, gloomy, miserable) |
| disheartening(adjective, dull, gloomy, miserable) |
| dispiriting(adjective, dull, gloomy, miserable, boring) |
| ennui |
| equable(adjective, calm, quiet, soft, reasonable) |
| feeble(adjective, dull, weak, bland, insipid) |
| gray(adjective, dull, dark, gloomy, faint) |
| ho hum(expression, adjective, dull, weak, simple) |