insuvsiosConfusable pair

Which to use

“insu” and “ios” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#12,987
“insu” frequency rank
#8,870
“ios” frequency rank
21857
confusion score

Side-by-Side Comparison

Feature insu ios
Definition 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. Pluriel de io.

Where the eye mixes insu and ios

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
insu
3 ch
ios

Look-alike desk: insu vs ios

A purely visual mix-up. insu (\ɛ̃.sy\) and ios (\jo\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 21857, derived from the frequency rank of both members and their visual similarity.

insu is recorded at frequency rank #12,987, classified as anoun, pronounced \ɛ̃.sy\. ios is at rank #8,870, tagged as anoun, pronounced \jo\.

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 21857, this pair ranks #361,077 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of insu vs ios

Shared letters: is. Private to "insu": nu. Private to "ios": o.

"insu" · 4 letters · shape VCCV  ·  "ios" · 3 letters · shape VVC

Known mistypes of this pair

  • insuinnsu · inssu · inus · isnu · nisu

Frequently Asked Questions

Do "insu" and "ios" mean the same thing in a sentence?
No. They are said differently (\ɛ̃.sy\ versus \jo\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "insu" or "ios"?
"ios" is the more common of the two: it sits at frequency rank #8,870 in our French list, against #12,987 for "insu". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Eye-level mix-up between "insu" and "ios" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "insu" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ios" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #361,077 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "insu" and "ios" also get mixed up with nearby pairs, the highest-scored neighbour is "instru vs insu". 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 #361,077 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list