Definition of Unable
Quick Meaning of Unable
Not able to do something; lacking the capacity or possibility.
Detailed Definition of Unable
Not having the power, skill, means, or opportunity to do something.
How to Pronounce Unable
Stress pattern: oOs (3-syllable word).
Tip: Stress on second syllable: un-AY-bul. The 'a' is the long 'a' vowel sound.
Watch out: Some say 'UN-able' with stress on first syllable; correct is un-AY-bul.
Origin and Etymology of Unable
Prefix 'un-' (not) + 'able' (capable), from Latin 'habilis' (suitable).
How to Use Unable in a Sentence
Each example shows “unable” with a CEFR level so learners can pick examples that match their fluency.
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“I am unable to attend the meeting tomorrow.”
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“The child was unable to reach the top shelf.”
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“Despite numerous attempts, the team remained unable to solve the complex equation.”
Synonyms and Antonyms of Unable
Common Synonyms for Unable
Smart Synonyms for Unable — When to Use Each
- incapable
- emphasizes lack of skill specifically
- powerless
- stresses lack of authority completely
- helpless
- conveys total inability and vulnerability
Antonyms of Unable
Common Collocations with Unable
These phrases pair with “unable” in everyday English:
- unable to help
- unable to attend
- unable to afford
Common Mistakes When Using Unable
Even fluent speakers slip up with “unable”. Here’s how to avoid the most common errors:
- ✗ Wrong: She is unable for attend the party.
- ✓ Correct: She is unable to attend the party.
- Why: With unable, use the infinitive 'to' not preposition 'for'.
- ✗ Wrong: They was unable to finish the project.
- ✓ Correct: They were unable to finish the project.
- Why: Plural subject requires 'were' not 'was'.
Words Confused With Unable
- Unable vs Disable: Disable means to make unable; unable is the state itself.
Other Forms of Unable
Frequently Asked Questions About Unable
What is the meaning of "Unable"?
Not able to do something; lacking the capacity or possibility.
How do you pronounce "Unable"?
The IPA is /ʌnˈeɪbəl/. Stress on second syllable: un-AY-bul. The 'a' is the long 'a' vowel sound.
What part of speech is "Unable"?
"Unable" is an adjective at A1 level (Common European Framework).
What are synonyms for "Unable"?
Common synonyms include incapable, powerless, helpless.
How do you use "Unable" in a sentence?
For example: "I am unable to attend the meeting tomorrow."