| unpleasant(adjective, mean, cool, tough, severe) |
| exhausting(adjective, dull, tough, difficult, awkward) |
| mean(adjective, person, cool, tough, severe) |
| relentless(adjective, mean, strong, tough, severe) |
| steely(adjective, strong, tough, firm, solid) |
| compact(adjective, characteristic, set, strong, tough) |
| sharp(adjective, strong, tough, severe, harsh) |
| sturdily |
| sturdy(adjective, person, set, body, strong) |
| tyrannical(adjective, tough, evil, nasty, harsh) |
| unforgiving(adjective, mean, tough, severe, rough) |
| unsparing(adjective, mean, strong, tough, severe) |
| withstanding |
| aloof(adjective, person, mean, cool, unpleasant) |
| antagonistic(adjective, person, mean, harsh, cruel) |
| biting(adjective, pain, sickness, ache, anguishes) |
| bitter(adjective, strong, love, tough, severe) |
| concrete(adjective, clear, strong, tough, solid) |
| dense(adjective, person, body, strong, tough) |
| dogged(adjective, mean, harsh, cruel, determined) |