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Words differentiation

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Able

Capable

able  if someone or something is able to do something, they have skills or qualities which make it possible for them to do it. 
   
  capable - if a person or thing is capable of doing something, they have the ability, capacity, or potential to do it.
The different usage between able and capable is ' able ' has a broader meaning in one's ability but ' capable ' shows one's ability in a more specialized aspect.
   

*

She is an able teacher. ( She is a teacher with quality )

*

She is a capable teacher. ( She has the ability to be a teacher )

____________________

     

Capable also shows a sense of possibility whereas there is no such usage with able.

     
*   The situation is capable of improvement. 

In this situation, we can't replace capable with able to show the possibility for improvement. 

 

____________________

     
Ability can be acquired through a series of training, but capability has nothing to do with training.
* I do not doubt his ability to do the work.
 
 
 
  eligible, illegible   moral, morale  
  eminent, imminent   persecuted, prosecuted  
  ensure, assure   personal, personnel  
  formally, formerly   precede, proceed  
  hanged, hung   price, prize  
  historic, historical   principal, principle  
  homework, housework   rational, rationale  
  human, humane   respectably, respectively  
  lie, lay   stationary, stationery  
  lose, loose   weather, whether  
  mature, matured      
  misused, disused   Words differentiation 1  
         
 
 
 
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