unstable

Adjective

• subject to change; variable
  • a fluid situation fraught with uncertainty
    
  • everything was unstable following the coup
    

• disposed to psychological variability
  • his rather unstable religious convictions
    

• suffering from severe mental illness
  • of unsound mind
    

• affording no ease or reassurance
  • a precarious truce
    

• 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
    
  • an unstable world economy
    

Related words

• Synonyms: 
  fluid , mentally ill , unsound , precarious