B1adjective2K

Unable

UK /["/ʌnˈeɪbl/"]/US /["/ʌnˈeɪbl/"]/

Definition

not having the skill, strength, time, knowledge, etc. to do something

In simple words: not able to do something

Examples

  • I was unable to attend the meeting due to a family emergency.
  • She felt unable to express her feelings clearly.
  • He remains unable to find a solution to the problem.
  • The project was unable to meet the deadlines set by the client.
  • They were unable to reach a consensus during the discussion.

Usage notes

Use 'unable' in situations where someone or something lacks the ability to perform an action. It's appropriate in both spoken and written contexts, but avoid in very casual conversations.

Grammar pattern

unable + to + verb

Memory hint

Think of 'unable' as 'un-able,' like a superhero who lost their powers.

Collocations

  • appear
  • be
  • feel
  • completely
  • quite
  • totally
  • unwilling or unable

Synonyms

  • incapable
  • powerless
  • incompetent
  • unfit

Antonyms

  • able
  • capable

Common mistakes

  • Confused with 'unable to' and 'not able to' — they mean the same but usage can vary.
  • Using 'unable' without a following action verb.
  • Misplacing adjectives — remember 'unable' always describes capability.