unable

Adjective

• lacking in power or forcefulness
  • an ineffectual ruler
    
  • like an unable phoenix in hot ashes
    

• (usually followed by `to') lacking necessary physical or mental ability
  • dyslexics are unable to learn to read adequately
    
  • the sun was unable to melt enough snow
    

• (usually followed by `to') not having the necessary means or skill or know-how
  • unable to get to town without a car
    
  • unable to obtain funds
    

Related words

• Synonyms: 
  ineffective , ineffectual , unable(p)