irrefutable
/ˌɪɹɪˈfjuːtəbəl/
"irrefutable" is a 11-letter English headword indexed on PlainSpell.
The verdict
“irrefutable” is a moderately-common English word, ranked #39,869 in English word frequency and used as an adjective.
- #39,869
- frequency rank, English
- 11
- letters
- 15
- tracked misspellings
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - undeniable; unable to be disproved or refuted
| Property | Value |
|---|---|
| Headword | irrefutable |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˌɪɹɪˈfjuːtəbəl/ |
| Letters | 11 |
| Frequency rank | #39,869 |
| Misspellings tracked | 15 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “irrefutable” sits in English frequency
Spelling & Dictionary Insight
The English entry for irrefutable is 11 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˌɪɹɪˈfjuːtəbəl/. Corpus data places it at rank #39,869 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "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
- 1undeniable; unable to be disproved or refuted
Etymology
From Late Latin irrefūtābilis, from ir- (“not”) + refūtābilis (“refutable”), from refūtō (“to refute”) + -bilis (“-able”), equivalent to ir- + refutable.
Synonyms
This word in other languages
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.
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
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Using “irrefutable”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-R-R-E-F-U-T-A-B-L-E - every other letter order is a misspelling in standard orthography.
- Say it as /ˌɪɹɪˈfjuːtəbəl/ (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.