1. (adjective) affording no ease or reassurance

• precarious

2. (adjective) suffering from severe mental illness

• mentally ill
• unsound

3. (adjective) subject to change; variable

• fluid

1. (adjective) lacking stability or fixity or firmness

• coseismal
• coseismic
• crank
• cranky
• tender
• tippy
• explosive
• volatile
• rickety
• shaky
• wobbly
• wonky
• rocky
• seismal
• seismic
• tipsy
• top-heavy
• tottering
• volcanic

2. (adjective) highly or violently reactive

• reactive

3. (adjective) affording no ease or reassurance

• uneasy

4. (adjective) suffering from severe mental illness

• insane

5. (adjective) disposed to psychological variability

• irresolute

6. (adjective) subject to change; variable

• changeable
• changeful

1. (adjective) lacking stability or fixity or firmness

• impermanent
• temporary
• inconstant
• unsteady

1. (adjective) lacking stability or fixity or firmness

• instability
• unstableness

2. (adjective) highly or violently reactive

• instability
• unstableness

3. (adjective) affording no ease or reassurance

• instability
• unstableness
• precariousness
• uncertainness
• uncertainty

4. (adjective) suffering from severe mental illness

• instability
• unstableness
• unsoundness

5. (adjective) disposed to psychological variability

• instability
• unstableness

6. (adjective) subject to change; variable

• fluidity
• fluidness

1. (adjective) lacking stability or fixity or firmness

• stable