| intransigent(adjective, tough, resist, determined, resolute) |
| smooth(verb, move, hold, press, push) |
| grim(adjective, tough, firm, resist, determined) |
| stern(adjective, characteristic, persistent, obstinate, insistent) |
| flatten(verb, activity, move, hold, calm) |
| determined(adjective, strong, hard, tough, firm) |
| fetter(noun, verb, free, restraint, bond) |
| strong(adjective, hard, tough, firm, determined) |
| indomitable(adjective, characteristic, strong, hard, tough) |
| manacle(noun, verb, free, restraint, shackle) |
| robust(adjective, strong, hard, tough, inflexible) |
| shackle(noun, verb, free, restraint, shackles) |
| uncompliant(adjective, tough, resist, unreasonable, grim) |
| bond(noun, free, restraint, shackle, metal) |
| ferrous(adjective, strong, hard, tough, inflexible) |
| incompliant(adjective, resist, determined, resolute, persistent) |
| irons(noun, shackles, chains, manacles, handcuff) |
| mangle(verb, move, hold, smooth, push) |
| restraint(noun, free, shackle, shackles, chains) |
| steely(adjective, dull, strong, hard, tough) |