Which to use
“sly” is an adjective and “ssi” is a conjunction - they look or sound alike but fill different roles in a sentence.
- #47,613
- “sly” frequency rank
- #42,065
- “ssi” frequency rank
- 89678
- confusion score
Side-by-Side Comparison
| Feature | sly | ssi |
|---|---|---|
| Definition | Matois, malin. | Abréviation de si et seulement si. |
Where the eye mixes sly and ssi
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. sly and ssi follow the identical consonant-vowel pattern (CCV). Same shape at a glance is often the real trap, independent of shared letters.
Visual trap between sly and ssi
These two trip readers on the page rather than in the ear: sly is \ˈslaɪ\ while ssi is \si e sœl.mɑ̃ si\. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adjective vs conjunction), which is usually the fastest check. Our composite confusion score for this pair is 89678, derived from the frequency rank of both members and their visual similarity.
sly is recorded at frequency rank #47,613, classified as anadj, pronounced \ˈslaɪ\. ssi is at rank #42,065, tagged as aconj, pronounced \si e sœl.mɑ̃ si\.
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 89678, this pair ranks #5,538 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of sly vs ssi
Shared letters: s. Private to "sly": ly. Private to "ssi": i.
"sly" · 3 letters · shape CCV · "ssi" · 3 letters · shape CCV
Frequently Asked Questions
Is swapping "sly" for "ssi" ever safe?
Which is more common, "sly" or "ssi"?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "sly" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ssi" - compare definitions side by side with the headword page. Word entry
- This pair ranks #5,538 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "sly" and "ssi" also get mixed up with nearby pairs, the highest-scored neighbour is "sly vs suu". Nearby pair
Confusion rank #5,538 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.