| hard(adjective, dull, rough, difficult, awkward) |
| irritating(adjective, dull, tough, severe, rough) |
| tough(adjective, dull, severe, difficult, boring) |
| uphill(adjective, tough, severe, difficult, awkward) |
| vapid(adjective, dull, weak, stupid, boring) |
| cumbersome(adjective, difficult, awkward, clumsy) |
| heavy(adjective, dull, tough, severe, difficult) |
| mundane(adjective, boring, dull, stupid, tedious) |
| ordinary(adjective, dull, simple, familiar, natural) |
| vexatious(adjective, dull, hard, rough, difficult) |
| weariful(adjective, dull, simple, excite, boring) |
| aggravating(adjective, hard, severe, pain, offensive) |
| common(adjective, ordinary, boring, tedious, dull) |
| drab(adjective, dull, stupid, boring, routine) |
| draining |
| exasperating(adjective, dull, boring, tired, tedious) |
| jejune |
| operose(adjective, tough, severe, difficult, awkward) |
| oppressive(adjective, dull, difficult, boring, tedious) |
| repetitious(adjective, dull, stupid, boring, routine) |