| insubstantial(adjective, uncertain, feeble, shaky, hesitant) |
| malleable(adjective, fickle) |
| no-good(adjective, unpredictable, unreliable, variable, irresponsible) |
| perfidious |
| perilous(insecure, risky, dangerous) |
| permutable(adjective, unstable, unsettled, fickle, variable) |
| pliable(adjective, fickle) |
| pliant(adjective, fickle) |
| protean(adjective, unstable, unsettled, variable) |
| quirky(adjective, delicate, awkward, complicated) |
| rash(adjective, careless, immoral, thoughtless, reckless) |
| reckless(adjective, careless, thoughtless, negligent) |
| restless(unstable, unsettled, variable) |
| risky(delicate, awkward, insecure, complicated, dangerous) |
| rocky(adjective, delicate, uncertain, awkward, feeble) |
| scatterbrained(careless, excited, immoral, thoughtless, unreliable) |
| shady(adjective, uncertain, dishonest, doubtful, deceitful) |
| sneaky(adjective, false, dishonest, deceitful, unreliable) |
| spasmodic(unstable, unsettled, variable) |
| ticklish(delicate, awkward, unstable, shaky, unreliable) |