| grueling(adjective, hard, tough, difficult, awkward) |
| painful(adjective, tough, severe, difficult, problematic) |
| rigorous(adjective, tough, rough, difficult, harsh) |
| rough(adjective, great, tough, difficult, heavy) |
| strained(adjective, true, burdensome) |
| taxing(adjective, heavy, burdensome) |
| trying(verb, adjective, hard, tough, severe) |
| gruelling |
| laboured |
| operose(adjective, tough, severe, difficult, awkward) |
| punishing |
| wearisome(adjective, tough, severe, difficult, awkward) |
| challenging(verb, adjective, great, tough, severe) |
| exhausting(adjective, hard, severe, rough, difficult) |
| herculean(adjective, tough, severe, difficult, awkward) |
| stiff(tough, severe, difficult, painful, problematic) |
| testing(noun, adjective, tough, difficult, awkward) |
| tiring(adjective, tough, rough, difficult, heavy) |
| titanic(tough, severe, painful, problematic, trying) |
| troublesome(adjective, tough, severe, difficult, awkward) |