| resolute(adjective, set, clear, strong, tough) |
| firm(adjective, good, set, clear, strong) |
| stubborn(adjective, characteristic, quality, strong, hard) |
| inflexible(adjective, strong, tough, flat, firm) |
| rigid(adjective, strong, hard, tough, severe) |
| uncompromising(adjective, clear, tough, severe, firm) |
| unyielding(adjective, clear, strong, hard, tough) |
| intransigent(adjective, tough, resolute, obstinate, stubborn) |
| set(adjective, strong, tough, severe, flat) |
| fixed(verb, adjective, set, clear, strong) |
| inexorable(adjective, strong, hard, tough, harsh) |
| obdurate(adjective, strong, hard, tough, flat) |
| insistent(adjective, set, firm, vigorous, resolute) |
| unbending(adjective, clear, strong, hard, tough) |
| resolved(verb, adjective, set, strong, severe) |
| immovable(adjective, strong, hard, tough, usual) |
| relentless(adjective, strong, hard, tough, firm) |
| steadfast(adjective, good, clear, strong, tough) |
| unrelenting(adjective, severe, harsh, cruel, fierce) |
| obstinate(adjective, strong, tough, firm, intense) |