unstable

Affording no ease or reassurance.

Suffering from severe mental illness.

Subject to change; variable.

“everything was unstable following the coup”

Disposed to psychological variability.

“his rather unstable religious convictions”

Highly or violently reactive.

“sensitive and highly unstable compounds”

Lacking stability or fixity or firmness.

“unstable political conditions”

“the tower proved to be unstable in the high wind”