| determinate(adjective, certain, limited, definite, inflexible) |
| dogged(adjective, inflexible) |
| enduring(adjective, certain, limited, definite, inflexible) |
| firm(adjective, certain, limited, definite, fixed) |
| hard-and-fast(adjective, hard, inflexible, intent, unalterable) |
| immovable(adjective, inflexible) |
| single-minded(adjective, inflexible) |
| unfaltering(adjective, certain, limited, definite, inflexible) |
| unflinching(adjective, certain, limited, definite, inflexible) |
| unmodifiable(adjective, set, certain, limited, definite) |
| unmovable(adjective, certain, limited, definite, fixed) |
| unwavering(adjective, set, certain, limited, definite) |
| abiding(adjective, certain, limited, definite, inflexible) |
| adamant(adjective, inflexible) |
| agreed(adjective, certain, limited, definite, inflexible) |
| arranged(adjective, certain, limited, definite, inflexible) |
| assiduous |
| certain(adjective, limited, definite, inflexible, restricted) |
| circumscribed(adjective, certain, limited, definite, inflexible) |
| confirmed(adjective, certain, limited, definite, inflexible) |