| stiff-necked(adjective, mean, strong, hard, tough) |
| unmoving(adjective, move, strong, secure, substantial) |
| wilful(adjective, determined, resolute, uncompromising, unshakeable) |
| hardheaded(adjective, strong, hard, tough, determined) |
| immotile(adjective, secure, steady, fixed, rigid) |
| imperturbable(adjective, calm, cool, firm, solid) |
| perverse(adjective, mean, hard, wild, determined) |
| rigorous(adjective, set, strong, hard, tough) |
| stern(adjective, determined, resolute, rigid, uncompromising) |
| still(adjective, secure, rigid, inflexible, passive) |
| unflinching(adjective, determined, fixed, resolute, persistent) |
| calm(adjective, cool, firm, solid, still) |
| cool(adjective, calm, firm, solid, steady) |
| dispassionate(adjective, cool, detached, blank, sober) |
| equable(adjective, firm, solid, stable, fixed) |
| irremovable(adjective, stability) |
| opinionated(adjective, determined, fixed, resolute, inflexible) |
| persevering(adjective, determined, steady, resolute, persistent) |
| quiet(secure, still, rigid, inflexible, stubborn) |
| real estate(noun, expression, idiom) |