irrefutable

/ˌɪɹɪˈfjuːtəbəl/

//ˌɪɹɪˈfjuːtəbəl// adj

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

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

The verdict

“irrefutable” has 15 generated spelling variants in the English index at frequency #39,869. The variants make it a useful spelling check.

#39,869
frequency rank, English
2,140
“I” headwords
15
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - undeniable; unable to be disproved or refuted

Corpus desk

Index EN-irrefutable · irrefutable · English

irrefutable · rank #39,869 · 15 variants · 0 confusables

  • FREQ-MID #39,869
  • LEN-MEGA 11 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 15 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH iridium

Nearest frequency peer: iridium (-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.

Rank peers near misspelling magnet “irrefutable”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “irrefutable” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for irrefutable
PropertyValue
Headwordirrefutable
LanguageEnglish
Part of speechAdjective
IPA/ˌɪɹɪˈfjuːtəbəl/
Letters11
Frequency rank#39,869
Misspellings tracked15
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “irrefutable”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).irrefutablelands here:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “iridium” (#39,868), “Ivo” (#39,870), “Jacobi” (#39,871). Among 2,140 “I” headwords, “irrefutable” is #39,869. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 15 spelling variants around irrefutable (IPA /ˌɪɹɪˈfjuːtəbəl/), anadjective. Corpus frequency is #39,869 among 2,140 “I” headwords. Dominant gloss: "undeniable; unable to be disproved or refuted".

Our generated misspelling index lists 15 likely wrong-spelling variants for irrefutable, with forms such as "irefutable", "irerfutable", and "irreffutable". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. Our dataset records no confusable match here, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From Late Latin irrefūtābilis, from ir- (“not”) + refūtābilis (“refutable”), from refūtō (“to refute”) + -bilis (“-able”), equivalent to ir- + refutable. The correct English form is irrefutable, spelled I-R-R-E-F-U-T-A-B-L-E.

Definition

  1. 1
    undeniable; unable to be disproved or refuted

Recorded use

Wiktionary examples

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

  1. […]clear and irrefutable evidence of the Cause I have undertaken
  2. True, there had been nothing, in his lifetime, viler than this man. She knew it, there was no other fact within her consciousness that she felt to be so certain; and yet, because her persecutor found himself safe and irrefutable in death, he frowned upon his victim, and threw back the blame on her!

Etymology

From Late Latin irrefūtābilis, from ir- (“not”) + refūtābilis (“refutable”), from refūtō (“to refute”) + -bilis (“-able”), equivalent to ir- + refutable.

Synonyms

inarguableincontestableincontrovertibleindeniableindisputableindubitableirrebuttableirrecusableirrefragablenondeniableunanswerableunassailableunattackableunchallengeableuncontrovertibleundebatableundeniableundiscutableundisputableundoubtableunimpeachableunquestionableunrebuttableunrecusableunshakable

Antonyms

arguablechallengeablecontradictabledeniabledisputablerefutable

This word in other languages

irrefutable(Español)irréfutable(Français)unwiderlegbar(Deutsch)irrefutável(Português)

Common misspellings

Also misspelled as:

  • irefutable
  • irerfutable
  • irreffutable
  • irreftuable
  • irrefuatble
  • irrefutabble
  • irrefutabel
  • irrefutablle
  • irrefutalbe
  • irrefutbale
  • irrefutible
  • irrefuttable
  • irreuftable
  • irrfeutable
  • rirefutable

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of irrefutable - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

irefutable1irerfutable2irreffutable1irreftuable2irrefuatble2irrefutabble1irrefutabel2irrefutablle1
Edit distance from "irrefutable"

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 "irrefutable"?
"irrefutable" is spelled I-R-R-E-F-U-T-A-B-L-E. The IPA pronunciation is /ˌɪɹɪˈfjuːtəbəl/.
What does "irrefutable" mean?
As an adjective, "irrefutable" means: undeniable; unable to be disproved or refuted
What are common misspellings of "irrefutable"?
Common misspellings include "irefutable", "irerfutable", "irreffutable", "irreftuable", "irrefuatble". The correct spelling is "irrefutable".
How do you pronounce "irrefutable"?
The IPA (International Phonetic Alphabet) transcription for "irrefutable" is /ˌɪɹɪˈfjuːtəbəl/. 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 "irrefutable"?
From Late Latin irrefūtābilis, from ir- (“not”) + refūtābilis (“refutable”), from refūtō (“to refute”) + -bilis (“-able”), equivalent to ir- + refutable. 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 "irrefutable", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

incinerator#39,857impatiently#39,855huckleberry#39,851homeostasis#39,849

Similar misspelling depth

Headwords with a similar count of attested misspellings (15 here; floor ≥5).

ergonomics15 variantspremarital15 variantsprojective15 variantsconceiving15 variants

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

Source: FrequencyWords open word-frequency list