Adjective

• S: (adj) unstable (lacking stability or fixity or firmness) "unstable political conditions"; "the tower proved to be unstable in the high wind"; "an unstable world economy"
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• S: (adj) unstable (highly or violently reactive) "sensitive and highly unstable compounds"
• S: (adj) precarious, unstable (affording no ease or reassurance) "a precarious truce"
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• S: (adj) mentally ill, unsound, unstable (suffering from severe mental illness) "of unsound mind"
• S: (adj) unstable (disposed to psychological variability) "his rather unstable religious convictions"
• S: (adj) fluid, unstable (subject to change; variable) "a fluid situation fraught with uncertainty"; "everything was unstable following the coup"