Which to use
“isi” is a verb and “iu” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #49,170
- “isi” frequency rank
- #46,833
- “iu” frequency rank
- 96003
- confusion score
Side-by-Side Comparison
| Feature | isi | iu |
|---|---|---|
| Definition | Deuxième personne du singulier du futur de l’indicatif du verbe isal/isañ. | Je. |
Where the eye mixes isi and iu
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. isi runs 3 letters (VCV) against iu's 2 (VV) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: isi vs iu
These two trip readers on the page rather than in the ear: isi is \ˈisːi\ while iu is \ˈiu\. 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 (verb vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 96003, derived from the frequency rank of both members and their visual similarity.
isi is recorded at frequency rank #49,170, classified as averb, pronounced \ˈisːi\. iu is at rank #46,833, tagged as apron, pronounced \ˈiu\.
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 96003, this pair ranks #836 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of isi vs iu
Shared letters: i. Private to "isi": s. Private to "iu": u.
"isi" · 3 letters · shape VCV · "iu" · 2 letters · shape VV
Frequently Asked Questions
Is swapping "isi" for "iu" ever safe?
Frequency check: "isi" vs "iu" - which ranks higher?
What to do next
Eye-level mix-up between "isi" and "iu" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "isi" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "iu" - compare definitions side by side with the headword page. Word entry
- This pair ranks #836 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "isi" and "iu" also get mixed up with nearby pairs, the highest-scored neighbour is "ime vs isi". Nearby pair
Confusion rank #836 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.