| toilsome(adjective, hard, great, tough, difficult) |
| trying(adjective, hard, difficult, heavy, complex) |
| violent(adjective, calm, strong, hard, severe) |
| sticky(adjective, hard, easy, difficult, informal) |
| thorny(adjective, hard, difficult, complex) |
| tricky(adjective, hard, easy, difficult, complex) |
| unpolished(adjective, good, hard, start, smooth) |
| uneven(adjective, mean, smooth, severe, sharp) |
| burdensome(adjective, hard, severe, difficult, heavy) |
| complex(adjective, hard, difficult, tedious, demanding) |
| vulgar(adjective, dull, mean, bad, hard) |
| grinding(adjective, hard, difficult, complex, awkward) |
| oppressive(adjective, hard, severe, difficult, heavy) |
| backbreaking(adjective, hard, difficult, heavy, complex) |
| complicated(adjective, hard, difficult, complex, awkward) |
| grievous(adjective, hard, difficult, unpleasant, complex) |
| gross(adjective, mean, bad, hard, smooth) |
| irregular(adjective, mean, property, coarse, uneven) |
| painful(adjective, bad, hard, difficult, offensive) |
| rasping(adjective, quiet, hard, severe, sharp) |