indubitable

/ɪnˈdjuːbɪtəbəl/

//ɪnˈdjuːbɪtəbəl// adj

"indubitable" is a 11-letter English headword indexed on PlainSpell.

The verdict

“indubitable” is outside the top-ranked English vocabulary, used as an adjective - the kind of word writers most often double-check.

Unranked
below top-frequency English
11
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Clearly true; providing no possibility of doubt.

Key facts for indubitable
PropertyValue
Headwordindubitable
LanguageEnglish
Part of speechAdjective
IPA/ɪnˈdjuːbɪtəbəl/
Letters11
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “indubitable” sits in English frequency

indubitable falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for indubitable is 11 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ɪnˈdjuːbɪtəbəl/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "Clearly true; providing no possibility of doubt.".

Our edit-distance generator produced no likely misspellings for indubitable, since its letter sequence doesn't invite the usual edit-distance slips. This headword has no recorded confusable partner, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: Either from French indubitable or Latin indubitābilis. By surface analysis, in- + dubitable. The correct English form is indubitable, spelled I-N-D-U-B-I-T-A-B-L-E.

Definition

  1. 1
    Clearly true; providing no possibility of doubt.

Etymology

Either from French indubitable or Latin indubitābilis. By surface analysis, in- + dubitable.

Synonyms

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "indubitable"?
"indubitable" is spelled I-N-D-U-B-I-T-A-B-L-E. The IPA pronunciation is /ɪnˈdjuːbɪtəbəl/.
What does "indubitable" mean?
As an adjective, "indubitable" means: Clearly true; providing no possibility of doubt.
How do you pronounce "indubitable"?
The IPA (International Phonetic Alphabet) transcription for "indubitable" is /ɪnˈdjuːbɪtəbəl/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "indubitable"?
Either from French indubitable or Latin indubitābilis. By surface analysis, in- + dubitable. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “indubitable”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is I-N-D-U-B-I-T-A-B-L-E - every other letter order is a misspelling in standard orthography.
  • Say it as /ɪnˈdjuːbɪtəbəl/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list