| impassive(adjective, unyielding, unbending, unreceptive) |
| impersuadable |
| impersuasible |
| in the bag(expression, adjective, idiom, certain, limited) |
| inert(calm, still, lifeless, inactive, motionless) |
| intent(adjective, intense, certain, limited, definite) |
| invariable |
| inveterate(adjective, certain, limited, definite, inflexible) |
| level(adjective, certain, limited, definite, inflexible) |
| limited(adjective, certain, definite, inflexible, restricted) |
| located(adjective, fixed) |
| nailed(adjective, still, fixed, rigid, inflexible) |
| nailed down(expression, still, fixed, motionless, stationary) |
| narrow(adjective, certain, limited, definite, inflexible) |
| never-failing(adjective, intense, certain, limited, definite) |
| nonmotile |
| nonmoving |
| obdurate(adjective, firm, intense, determined, resolute) |
| planned(adjective, certain, limited, definite, inflexible) |
| prearranged(adjective, certain, limited, definite, inflexible) |