The word ‘ability’ refers to the power, skill, or capacity to do something effectively. It indicates competence, talent, or aptitude in performing a particular task.
For example:
• She has the ability to solve complex problems easily.
• His ability to speak multiple languages is impressive.
The opposite of this concept is the **lack of ability**—the state of being unable to perform or do something. The word that expresses this opposite meaning is ‘inability’.
For example:
• His inability to focus caused him to fail the exam.
• The inability to adapt to change can lead to failure.