insecure

Adjective

• not safe from attack

• lacking self-confidence or assurance
  • an insecure person lacking mental stability
    

• lacking in security or safety
  • his fortune was increasingly insecure
    
  • an insecure future
    

• not firm or firmly fixed; likely to fail or give way
  • the hinge is insecure
    

Related words

• Antonyms: 
  secure , unafraid , untroubled