| steadfast(adjective, move, secure, firm, solid) |
| insistent(adjective, determined, resolute, obstinate, uncompromising) |
| fast(adjective, strong, secure, firm, solid) |
| adamantine(adjective, strong, hard, tough, cruel) |
| unwavering(adjective, secure, firm, solid, determined) |
| stable(adjective, strong, secure, firm, solid) |
| steady(adjective, move, calm, strong, cool) |
| hard-nosed(adjective, mean, strong, hard, secure) |
| secure(adjective, strong, firm, solid, steady) |
| constant(adjective, secure, firm, solid, determined) |
| immobile(adjective, move, strong, secure, solid) |
| mulish(adjective, mean, strong, hard, tough) |
| rooted(adjective, strong, secure, solid, usual) |
| unchangeable(adjective, set, hard, secure, firm) |
| unshakeable(adjective, determined, resolute, uncompromising) |
| hard(adjective, mean, strong, tough, cruel) |
| intractable(adjective, hard, firm, difficult, determined) |
| stationary(adjective, move, strong, secure, fixed) |
| unbendable(adjective, determined, resolute, obstinate, uncompromising) |
| unmovable(adjective, move, cruel, still, fixed) |