unable - Master This Word
Master this word with our 5-step learning method – Learn English in English
unable Word Meanings
- not able to do something
- without the power or means to act
- incapable or lacking the ability
unable Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
unable Phonetic & Pronunciation
UK
/ʌˈneɪ.bəl/
US
/ʌˈneɪ.bəl/
unable Word Etymology
un- = not + able = capable; Latin 'abilēs' meaning 'able', through Old French and into English; Picture a person trying to lift a heavy box but unable to do so due to lack of strength.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputEnglish Brain Route
I reach for the door, plant my feet, and push as I turn the handle. The door stays firm and nothing moves. A stubborn ache climbs from my shoulders, and I feel unable to get through right now. I adjust my grip, take a slow breath, and decide to back off and look for another way.
Real Context
Unable is a more formal, written option than can't and describes a temporary or permanent lack of power, resources, or permission to act. It emphasizes external limits rather than personal choice, and it is typically followed by to + base verb (be unable to do something). In everyday speech, you might hear not able to or can't, but in business, medical, or legal contexts, unable sounds more precise. It also appears in past tense as was/were unable to, and in future forms as will be unable to. Understanding how the phrase signals external constraint will help you choose the right tone in different registers. Examples illustrate physical, logistical, or procedural barriers.
Usage Reminders
- 1) Unable to + to + base verb; 2) Use was/were unable to for past events; 3) Use will be unable to for future events; 4) Prefer unable to in formal writing over can't or not able to; 5) Do not say unable of; 6) Reserve for external barriers, not personal lack of skill.
Common Misconceptions
- Confusing 'unable' with 'not able' in casual speech; 'unable' is more formal and common in writing.
- Thinking 'unable to' means a lack of skill rather than external constraint.
- Using 'unable of' is incorrect; always 'unable to + verb'.
- Missing that future/past forms use 'will be unable to' and 'was/were unable to'.
- Assuming 'unable' only applies to people; machines and processes can be unable too.
Thinking Differences
In English, 'unable' signals a formal tone and is common in writing; learners often overuse 'unable' in casual speech. The key is be + unable + to + verb for external limits, while 'not able' or 'can't' fits informal contexts. Remember not to use 'unable of'.
Learning Tips
- Memorize the structure be unable to + verb.
- Compare with can't and not able to to choose tone.
- Practice past: was/were unable to + verb.
- Practice future: will be unable to + verb.
- Avoid 'unable of'; use 'unable to'.
- Use in formal writing (reports, letters).
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the meaning of the word 'unable'?
A.Happy
B.Capable
C.Unable
D.Eager
Step 2: Usage
In which of the following sentences is 'unable' used correctly?
A.I am unable to attend the meeting due to a prior commitment.
B.She was unable to finish her homework because she was lazy.
C.He is unable to solve the math problem as he is very smart.
D.The team was unable to win the game because they practiced hard.
Step 3: Similar Words
Which word is the opposite of 'unable'?
A.Doubtful
B.Willing
C.Careless
D.Stuck
Step 4: Opposite Words
Choose the word similar in meaning to 'unable'.
A.Kind
B.Able
C.Happy
D.Generous
Step 5: Mastery
In what real-life context would someone use the word 'unable'?
A.Cooking a meal
B.Driving a car
C.Missing a deadline
D.Solving a difficult puzzle
Related Listening
🔥 Advanced
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