unstable

英[ʌn'steɪb(ə)l] 美[ʌn'stebl]

1. lacking stability or fixity or firmness;

"unstable political conditions"

"the tower proved to be unstable in the high wind"

"an unstable world economy"

2. highly or violently reactive;

"sensitive and highly unstable compounds"

3. affording no ease or reassurance;

"a precarious truce"

4. suffering from severe mental illness;

"of unsound mind"

5. disposed to psychological variability;

"his rather unstable religious convictions"

6. subject to change; variable;

"a fluid situation fraught with uncertainty"

"everything was unstable following the coup"