sisvsslyWhich spelling fits?

Which to use

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

#19,157
“sis” frequency rank
#47,613
“sly” frequency rank
66770
confusion score

Side-by-Side Comparison

Feature sis sly
Definition Qui est situé. Matois, malin.

Where the eye mixes sis and sly

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch
sis
3 ch
sly

Look-alike desk: sis vs sly

A purely visual mix-up. sis (\si\) and sly (\ˈslaɪ\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 66770, derived from the frequency rank of both members and their visual similarity.

sis is recorded at frequency rank #19,157, classified as anadj, pronounced \si\. sly is at rank #47,613, tagged as anadj, pronounced \ˈslaɪ\.

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 66770, this pair ranks #66,316 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of sis vs sly

Shared letters: s. Private to "sis": i. Private to "sly": ly.

"sis" · 3 letters · shape CVC  ·  "sly" · 3 letters · shape CCV

Frequently Asked Questions

Do "sis" and "sly" mean the same thing in a sentence?
No. They are said differently (\si\ versus \ˈslaɪ\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "sis" or "sly"?
"sis" is the more common of the two: it sits at frequency rank #19,157 in our French list, against #47,613 for "sly". 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 "sis" and "sly" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "sis" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sly" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #66,316 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "sis" and "sly" also get mixed up with nearby pairs, the highest-scored neighbour is "sly vs suu". Nearby pair

Confusion rank #66,316 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