| torpid(dull, sluggish, lazy, passive, hidden) |
| unfit(adjective, weak, skill, inept, powerless) |
| unfruitful(adjective, inferior, inadequate, limited, feeble) |
| unproductive(adjective, weak, stupid, idle, inadequate) |
| unserviceable(impractical, hopeless, unusable) |
| abeyant(adjective, dull, idle, sluggish, lazy) |
| abortive(weak, stupid, inferior, idle, inadequate) |
| crippled |
| fallow(calm, gentle, still, sluggish, inactive) |
| haywire |
| inanimate(adjective, still, lifeless, inactive, alive) |
| inapplicable |
| incompetent(weak, skill, stupid, idle, inadequate) |
| inept(weak, stupid, idle, inadequate, feeble) |
| inert(adjective, action, calm, gentle, sluggish) |
| kaput |
| out of order(expression, adjective, idiom, down, broken) |
| out of whack(expression, idiom) |
| quiescent(adjective, calm, dull, gentle, cold) |
| unable(adjective, skill, inferior, inadequate, limited) |