incontrovertible

/ˌɪŋ.kɒn.tɹəˈvɜː.təbl̩/

//ˌɪŋ.kɒn.tɹəˈvɜː.təbl̩// adj

By · According to Wiktionary data (CC BY-SA) ·

"incontrovertible" is a 16-letter English headword indexed on PlainSpell.

The verdict

“incontrovertible” is uncommon English (frequency #55,511 among 2,140 “I” headwords), classed as an adjective. The kind of spelling people second-guess.

#55,511
frequency rank, English
2,140
“I” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Not capable of being denied, challenged, or disputed; closed to questioning.

Corpus desk

Index EN-incontrovertible · incontrovertible · English

incontrovertible · rank #55,511 · 0 variants · 0 confusables

  • FREQ-RARE #55,511
  • LEN-MEGA 16 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH incentivize

Nearest frequency peer: incentivize (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Long-tail ranks near “incontrovertible”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “incontrovertible” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for incontrovertible
PropertyValue
Headwordincontrovertible
LanguageEnglish
Part of speechAdjective
IPA/ˌɪŋ.kɒn.tɹəˈvɜː.təbl̩/
Letters16
Frequency rank#55,511
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “incontrovertible” in English

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).incontrovertiblefalls in this rarity band:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Rare peers in the same band: “incentivize” (#55,510), “incorruptible” (#55,512), “impudent” (#55,509). Among 2,140 “I” headwords, “incontrovertible” is #55,511. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

incontrovertible is uncommon English at frequency #55,511 among 2,140 “I” headwords, classed as anadjective, transcribed /ˌɪŋ.kɒn.tɹəˈvɜː.təbl̩/. Rarity is why readers land here mid-draft. Gloss: "Not capable of being denied, challenged, or disputed; closed to questioning.".

No misspelling variants are generated for incontrovertible in our index, since its letter sequence doesn't invite the usual edit-distance slips. Our dataset records no confusable match here, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From in- + controvertible. The correct English form is incontrovertible, spelled I-N-C-O-N-T-R-O-V-E-R-T-I-B-L-E.

Definition

  1. 1
    Not capable of being denied, challenged, or disputed; closed to questioning.

Recorded use

Wiktionary examples

These source excerpts show how incontrovertible appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. incontrovertible evidence
  2. Her statement that dogs are mammals is incontrovertible.

Etymology

From in- + controvertible.

Synonyms

inarguableincontestable

This word in other languages

incontrovertible(Español)irréfutable(Français)unbestreitbar(Deutsch)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "incontrovertible"?
"incontrovertible" is spelled I-N-C-O-N-T-R-O-V-E-R-T-I-B-L-E. The IPA pronunciation is /ˌɪŋ.kɒn.tɹəˈvɜː.təbl̩/.
What does "incontrovertible" mean?
As an adjective, "incontrovertible" means: Not capable of being denied, challenged, or disputed; closed to questioning.
How do you pronounce "incontrovertible"?
The IPA (International Phonetic Alphabet) transcription for "incontrovertible" is /ˌɪŋ.kɒn.tɹəˈvɜː.təbl̩/. 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 "incontrovertible"?
From in- + controvertible. 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "incontrovertible", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 16 letters (nearest by frequency rank).

pharmacokinetics#55,643reclassification#55,682internationalism#56,200nonproliferation#54,360

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

Source: FrequencyWords open word-frequency list