| incrusted |
| indolent(dull, idle, sluggish, lazy, motionless) |
| inelastic(adjective, hard, firm, solid, stiff) |
| inexorable(adjective, determined, resolute, uncompromising, unshakeable) |
| inoperative(adjective, dull, idle, sluggish, lazy) |
| irreversible(adjective, normal, even, rigid, inflexible) |
| jellied(adjective, set, solid, heavy, deep) |
| jobless(adjective, dull, idle, sluggish, lazy) |
| lapidified |
| latent(adjective, dull, idle, sluggish, lazy) |
| lax(adjective, dull, idle, sluggish, lazy) |
| lazy(adjective, dull, idle, sluggish, passive) |
| lethargic(dull, sluggish, lazy, motionless, unmoving) |
| level(adjective, even, rigid, inflexible, reliable) |
| limp(adjective, dull, idle, sluggish, lazy) |
| low-key(adjective, dull, idle, sluggish, lazy) |
| mechanical(adjective, hard, firm, solid, tense) |
| monolithic(adjective, normal, even, rigid, inflexible) |
| mothballed(adjective, dull, idle, sluggish, lazy) |
| motionless(adjective, dull, idle, sluggish, lazy) |