| unwavering(adjective, determined, resolute, persistent, constant) |
| inevitable(adjective, strong, certain, necessity, coming) |
| pitiless(adjective, mean, hard, tough, severe) |
| uncompliant(adjective, resist, determined, resolute, obstinate) |
| unshakeable(adjective, determined, resolute, uncompromising) |
| austere(adjective, appearance, mean, strong, hard) |
| inescapable(adjective, cruel, pitiless, necessary, coming) |
| set in stone(expression, adjective, idiom, mean, hard) |
| steely(adjective, strong, hard, tough, determined) |
| incompliant(adjective, tough, firm, resist, determined) |
| necessary(adjective, certain, cruel, obvious, pitiless) |
| standing pat(expression, adjective, tough, firm, determined) |
| tenacious(adjective, tough, firm, determined, resolute) |
| unavoidable(adjective, bound, necessity, necessary, coming) |
| unchangeable(adjective, hard, resolute, rigid, inflexible) |
| unswayable(adjective, tough, firm, determined, distant) |
| brassbound(adjective, resist, determined, resolute, persistent) |
| die-hard(adjective, resist, determined, resolute, persistent) |
| resolved(adjective, determined, resolution, resolute, persistent) |
| stiff-necked(adjective, mean, strong, hard, tough) |