Able (adjective)

1. Having sufficient power, skill, resources, or qualifications to do something.
2. Having the means or ability to do something.
3. Possessing the necessary physical or mental ability to perform a task.
4. Having the power or capacity to exist, act, or function.
5. Competent or capable in a particular sphere or activity.

Origin:

Middle english: from old french, from latin habilis, from habere "to have".

Examples:

1. She is able to play the piano.
2. He is not able to lift heavy weights.
3. They are able to solve the problem.
4. She was able to finish the project on time.
5. They are not able to understand the instructions.