unable

adjective

1. 1

   (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

2. 2

   (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

3. 3

   lacking in power or forcefulness

   an ineffectual ruler

   like an unable phoenix in hot ashes