Which to use
“inouï” is an adjective and “insu” is a noun - they look or sound alike but fill different roles in a sentence.
- #32,859
- “inouï” frequency rank
- #12,987
- “insu” frequency rank
- 45846
- confusion score
Side-by-Side Comparison
| Feature | inouï | insu |
|---|---|---|
| Definition | Qu’on n’a pas ouï. | Utilisé uniquement dans la locution figée à l’insu de quelqu'un, et, dans les locutions analogues, à mon insu, à votre insu… C’est-à-dire la chose n'étant pas sue de quelqu'un, de moi, de vous, etc. |
Where the eye mixes inouï and insu
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. inouï runs 5 letters (VCVVC) against insu's 4 (VCCV) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: inouï vs insu
These two trip readers on the page rather than in the ear: inouï is \i.nwi\ while insu is \ɛ̃.sy\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 45846, derived from the frequency rank of both members and their visual similarity.
inouï is recorded at frequency rank #32,859, classified as anadj, pronounced \i.nwi\. insu is at rank #12,987, tagged as anoun, pronounced \ɛ̃.sy\.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 45846, this pair ranks #199,575 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of inouï vs insu
Shared letters: inu. Private to "inouï": oï. Private to "insu": s.
"inouï" · 5 letters · shape VCVVC · "insu" · 4 letters · shape VCCV
Known mistypes of this pair
- insu ← innsu · inssu · inus · isnu · nisu
Frequently Asked Questions
Can "inouï" and "insu" be used interchangeably?
Which is more common, "inouï" or "insu"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "inouï" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "insu" - compare definitions side by side with the headword page. Word entry
- This pair ranks #199,575 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "inouï" and "insu" also get mixed up with nearby pairs, the highest-scored neighbour is "inouï vs input". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #199,575 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.