| toilful(adjective, tough, rough, difficult, heavy) |
| troublesome(adjective, tough, severe, rough, difficult) |
| trying(adjective, tough, severe, painful, problematic) |
| unsparing(adjective, tough, rough, difficult, heavy) |
| unyielding(adjective, tough, severe, painful, problematic) |
| uphill battle(expression, adjective, tough, rough, difficult) |
| upstream(adjective, tough, severe, painful, problematic) |
| wearing(adjective, tough, rough, difficult, heavy) |
| wearisome(adjective, tough, severe, rough, difficult) |
| wearying(adjective, tough, rough, difficult, heavy) |
| wicked |
| argumentative(tough, problematic, trying) |
| bearish(tough, problematic, trying) |
| boorish(tough, problematic, trying) |
| capricious |
| finical |
| fractious(tough, problematic, trying) |
| grim(tough, problematic, trying) |
| grueling(adjective, tough, difficult, awkward, grim) |
| hard to please(expression, idiom, tough, problematic, trying) |