incommensurable
/ɪnkəˈmɛnʃ(ə)ɹəbəl/
"incommensurable" is a 15-letter English headword indexed on PlainSpell.
The verdict
“incommensurable” 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
- 15
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - having a ratio that is not expressible as a fraction of two integers.
| Property | Value |
|---|---|
| Headword | incommensurable |
| Language | English |
| Part of speech | Adjective |
| IPA | /ɪnkəˈmɛnʃ(ə)ɹəbəl/ |
| Letters | 15 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “incommensurable” sits in English frequency
Spelling & Dictionary Insight
The English entry for incommensurable is 15 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ɪnkəˈmɛnʃ(ə)ɹəbəl/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.
The misspelling generator found no plausible variants for incommensurable, which points to an orthography that plays by predictable English rules. This headword has no recorded confusable partner, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From Middle French incommensurable, from Medieval Latin incommensurabilis. Its full etymology is equivalent to that of in- + commensurable. The correct English form is incommensurable, spelled I-N-C-O-M-M-E-N-S-U-R-A-B-L-E.
Definition
- 1having a ratio that is not expressible as a fraction of two integers.
- 2having no common integer divisor except 1.
- 3Not able to be measured by the same standards as another term in the context.
Etymology
From Middle French incommensurable, from Medieval Latin incommensurabilis. Its full etymology is equivalent to that of in- + commensurable.
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
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Using “incommensurable”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-C-O-M-M-E-N-S-U-R-A-B-L-E - every other letter order is a misspelling in standard orthography.
- Say it as /ɪnkəˈmɛnʃ(ə)ɹəbəl/ (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.