| severe(adjective, hard, tough, severe, rough) |
| burdensome(adjective, dull, hard, severe, rough) |
| arduous(adjective, dull, hard, tough, severe) |
| cruel(adjective, hard, severe, difficult, harsh) |
| grievous(adjective, hard, severe, difficult, complex) |
| hard(adjective, dull, tough, severe, rough) |
| tough(adjective, dull, hard, severe, firm) |
| difficult(adjective, dull, hard, tough, severe) |
| unbearable(adjective, bad, hard, difficult, complex) |
| weighty(adjective, hard, difficult, heavy, complex) |
| painful(adjective, hard, difficult, complex, painful) |
| trying(adjective, dull, hard, tough, difficult) |
| laborious(adjective, dull, hard, severe, rough) |
| leaden(adjective, hard, difficult, heavy, complex) |
| sticky(adjective, moist, close, hard, difficult) |
| heavy-handed(adjective, hard, difficult, complex, overwhelming) |
| sad(adjective, dull, hard, severe, obscure) |
| taxing(adjective, hard, difficult, heavy, complex) |
| sore(adjective, hard, difficult, complex, painful) |
| tyrannical(adjective, cruel, severity, arrogant, overwhelming) |