| resolute(adjective, calm, strong, secure, tough) |
| rigid(adjective, mean, hard, tough, severe) |
| stubborn(adjective, mean, hard, secure, tough) |
| uncompromising(adjective, mean, hard, secure, tough) |
| determined(adjective, firm, solid, usual, steady) |
| inflexible(adjective, mean, hard, secure, tough) |
| hard-nosed(adjective, mean, hard, secure, determined) |
| insistent(adjective, determined, resolute, obstinate, uncompromising) |
| intransigent(adjective, determined, resolute, obstinate, uncompromising) |
| set(adjective, calm, strong, secure, firm) |
| firm(adjective, calm, set, mean, strong) |
| fixed(adjective, mean, hard, secure, firm) |
| immovable(adjective, mean, hard, secure, firm) |
| inexorable(adjective, mean, hard, tough, firm) |
| obdurate(adjective, determined, resolute, obstinate, stubborn) |
| unbending(adjective, mean, hard, determined, resolute) |
| unrelenting(adjective, mean, hard, tough, firm) |
| relentless(adjective, mean, hard, tough, firm) |
| standing pat(expression, adjective, tough, firm, determined) |
| unbendable(adjective, determined, resolute, obstinate, uncompromising) |