| stubborn(adjective, resolute, determined, uncompromising, obstinate) |
| inflexible(adjective, mean, strong, hard, tough) |
| rigid(adjective, mean, strong, hard, tough) |
| unyielding(adjective, mean, clear, strong, hard) |
| uncompromising(adjective, mean, clear, hard, tough) |
| firm(adjective, mean, clear, strong, hard) |
| intransigent(adjective, resist, determined, resolute, persistent) |
| inexorable(adjective, mean, strong, hard, tough) |
| obdurate(adjective, strong, hard, tough, severe) |
| unrelenting(adjective, mean, strong, hard, tough) |
| determined(adjective, clear, strong, hard, tough) |
| resolute(adjective, clear, strong, hard, tough) |
| relentless(adjective, mean, strong, hard, tough) |
| stiff(adjective, hard, correct, severe, rough) |
| immovable(adjective, mean, strong, hard, tough) |
| adamant(adjective, mean, strong, hard, tough) |
| fixed(adjective, mean, strong, hard, flat) |
| set(adjective, strong, flat, firm, certain) |
| insistent(adjective, determined, resolute, obstinate, uncompromising) |
| obstinate(adjective, mean, hard, tough, severe) |