| galling(adjective, tough, severe, painful, problematic) |
| gargantuan(adjective, tough, severe, painful, problematic) |
| grievous |
| grim(adjective, tough, problematic, trying) |
| grueling(adjective, tough, problematic, trying) |
| handful |
| hard(noun, adjective, work, tough, difficult) |
| hard-won(adjective, tough, severe, painful, problematic) |
| hard job |
| heavy(adjective, tough, severe, painful, problematic) |
| herculean(adjective, tough, severe, painful, problematic) |
| immense(adjective, tough, severe, painful, problematic) |
| importunate |
| insistent |
| irritating(adjective, tough, severe, painful, problematic) |
| labor(noun, work, hard, grind) |
| labored(adjective, tough, severe, painful, problematic) |
| laborious(adjective, tough, severe, painful, problematic) |
| no picnic(expression, adjective, tough, severe, painful) |
| not easy(expression, adjective, idiom, tough, severe) |