| soul-crushing |
| time-consuming(dull, heavy, late, behind, arduous) |
| wearying(adjective, dull, boring, dreary, irritating) |
| bland(adjective, dull, weak, plain, mild) |
| commonplace(adjective, dull, simple, flat, plain) |
| heavy(adjective, dull, severe, flat, difficult) |
| dead(adjective, dull, weak, simple, flat) |
| jejune(adjective, dull, weak, flat, ordinary) |
| ordinary(adjective, boring, dull, flat, dry) |
| ponderous(adjective, dull) |
| soporific(adjective, dull, flat, ordinary, dry) |
| unexciting(adjective, dull, weak, plain, mild) |
| arid(adjective, dull, flat, stupid, ordinary) |
| drab(adjective, dull, weak, simple, plain) |
| fatiguing(adjective, dull, boring, monotonous, irritating) |
| long-winded(adjective, dull, boring, confused, long) |
| prolix(noun, adjective, flat, ordinary, dry) |
| routine(noun, adjective, dull, weak, simple) |
| uninspiring(adjective, dull, flat, dry, boring) |
| colourless |