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Incapable vs. unable: what’s the difference?

The short answer

Incapable often implies an inherent or intrinsic lack of ability, suggesting a more permanent or characteristic inability. Unable is typically used to describe a temporary or situational lack of ability due to specific circumstances.

What they have in common

Both incapable and unable describe a lack of ability or capacity to do something. They are adjectives used to indicate that someone or something cannot perform a specific action or function.

Examples

incapable

  • She is incapable of lying.
  • The device is incapable of processing large amounts of data.
  • He felt incapable of making a decision at that moment.

unable

  • He was unable to attend the meeting.
  • They are unable to reach an agreement.
  • She is unable to lift heavy objects due to her injury.

Which one is more common?

Internet search results for “incapable” and “unable”

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