indubitable - Master This Word
Master this word with our 5-step learning method – Learn English in English
indubitable Word Meanings
- certain or unquestionable
- cannot be doubted
- absolute and undeniable
indubitable Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
indubitable Phonetic & Pronunciation
UK
/ɪnˈdjuːbɪtəbl/
US
/ɪnˈdubɪtəbl/
indubitable Word Etymology
in- = not + dubitare = to doubt; Latin → Old French → English. Picture a solid rock in a storm, unshakeable and clear, representing certainty without doubt.
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 InputReal Context
Indubitable means certain or unquestionable; it is a formal adjective used to describe evidence, conclusions, or facts that leave no room for doubt. It carries a sense of rock-solid certainty, often appearing in legal, philosophical, or literary contexts rather than everyday speech. Learners tend to confuse it with undeniable or indisputable, but indubitable emphasizes not just strong evidence but the absence of any doubt at all. Common collocations include evidence, conclusion, fact, and the idea that a claim is beyond question in a rigorous argument. Use it when you want to highlight absolute certainty and a high level of formality.
Usage Reminders
- Indubitable is formal; avoid in casual speech.
- Pair it with nouns like evidence, conclusion, or fact.
- Don’t confuse it with undeniable; they’re not interchangeable in formal writing.
- It can appear before a noun or as a predicative adjective after be.
- Reserve for strong, pretty irrefutable claims in serious writing.
Common Misconceptions
- Think it is just a stronger version of certain; it actually conveys no doubt at all.
- Confuse with undeniable or indisputable in casual speech.
- Assume it describes feelings rather than objective facts.
- Overuse in everyday conversations where plain language would suffice.
- Mistake its strength for 'obvious' rather than 'proved beyond doubt'.
Thinking Differences
Indubitable conveys a level of certainty that is strong, formal, and often used in arguments, investigations, or literary prose. Learners tend to over- or under-shoot the strength, confusing it with mere certainty or with everyday phrases like 'certain' or 'obvious'.
Learning Tips
- Recognize its formal tone and prefer in writing, not speech.
- Pair with strong nouns like evidence, conclusion, fact.
- Compare with undeniable and indisputable to sense subtle differences.
- Watch for a rock-like certainty metaphor when explaining claims.
- Practice with legal or philosophical examples.
- Avoid overusing in casual essays.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the meaning of 'indubitable'?
A.Possible
B.Undeniable
C.Confusing
D.Common
Step 2: Usage
In which sentence is 'indubitable' used correctly?
A.She was very indubitable about her decision.
B.It's hard to trust someone who is indubitable.
C.His explanation was indubitable to me.
D.The evidence was indubitable and could not be questioned.
Step 3: Similar Words
Which word is an antonym of 'indubitable'?
A.Questionable
B.Certain
C.Ambiguous
D.Doubtful
Step 4: Opposite Words
How would you apply 'indubitable' in a real-life situation?
A.Expressing doubt about a friend's plans
B.Giving undeniable evidence in a court case
C.Changing your opinion frequently
D.Avoiding making decisions
Step 5: Mastery
Reflect on the meaning of 'indubitable'.
A.Share a personal experience of being sure about something
B.Discuss why certainty is important
C.Explain how doubt can affect decision-making
D.Describe a situation where doubt led to a positive outcome
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