| inflexible(adjective, determined, resolute, uncompromising, unshakeable) |
| stubborn(adjective, change, position, attitude, determination) |
| die-hard(adjective, determined, resolute, uncompromising, unshakeable) |
| inexorable(adjective, determined, resolute, uncompromising, unshakeable) |
| intransigent(adjective, determined, resolute, uncompromising, unshakeable) |
| rigid(adjective, determined, resolute, uncompromising, unshakeable) |
| unbending(adjective, determined, resolute, uncompromising, unshakeable) |
| uncompromising(adjective, determined, resolute, unshakeable) |
| unrelenting(adjective, determined, resolute, uncompromising, unshakeable) |
| unyielding(adjective, determined, resolute, uncompromising, unshakeable) |
| rockbound |
| firm(adjective, determined, resolute, uncompromising, unshakeable) |
| grim(adjective, determined, resolute, uncompromising, unshakeable) |
| immovable(adjective, determined, resolute, uncompromising, unshakeable) |
| implacable(adjective, determined, resolute, uncompromising, unshakeable) |
| iron(adjective, determined, resolute, uncompromising, unshakeable) |
| obdurate(adjective, determined, resolute, uncompromising, unshakeable) |
| relentless(adjective, determined, resolute, uncompromising, unshakeable) |
| rocky(adjective, rugged, stony) |
| steely(adjective, determined, resolute, uncompromising, unshakeable) |