| ponderous(adjective, dull, hard, difficult, complex) |
| weighty(adjective, dull, hard, difficult, complex) |
| tough(adjective, hard, difficult, complex) |
| leaden(adjective, hard, difficult, complex) |
| plodding(adjective, dull, hard, difficult, complex) |
| sticky(adjective, hard, difficult, complex) |
| burdensome(adjective, hard, difficult, complex) |
| nasty(adjective, hard, difficult, complex) |
| rough(adjective, hard, difficult, complex) |
| hard(adjective, difficult, complex) |
| messy(adjective, hard, difficult, complex) |
| soul-crushing |
| boring(adjective, dull, dreary, drab, colorless) |
| stuffy(adjective, dull, flat, warm, stupid) |
| heavy(adjective, dull, solid, substantial, rich) |
| dull(adjective, flat, excite, warm, plain) |
| tedious(adjective, dull, flat, heavy, stupid) |
| fogyish |
| pedestrian(noun, adjective, dull, excite, everyday) |
| monotonous(adjective, dull, flat, heavy, stupid) |