unfit

Adjective

• physically unsound or diseased
  • has a bad back
    
  • a bad heart
    
  • bad teeth
    
  • an unsound limb
    
  • unsound teeth
    

• not in good physical or mental condition; out of condition
  • fat and very unfit
    
  • certified as unfit for army service
    
  • drunk and unfit for service
    

• below the required standards for a purpose
  • an unfit parent
    
  • unfit for human consumption
    

Verb

• make unfit or unsuitable
  • Your income disqualifies you
    

Related words

• Synonyms: 
  bad , unsound , disqualify , indispose
• Antonyms: 
  fit , qualify , dispose