sei vs st, What's the Difference?

Which to use

“sei” is a verb and “st” is a symbol - they look or sound alike but fill different roles in a sentence.

#36,154
“sei” frequency rank: #1,190
“st” frequency rank: 37344
confusion score

Side-by-Side Comparison

Feature	sei	st
Definition	Deuxième personne du singulier de l’impératif présent de sein.	Symbole de la stère.

Letter map: sei vs st

Shared letters muted; letters that set sei and st apart highlighted. Shared run: 1.

3 ch

sei

2 ch

Role in the sentence - sei and st

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sei is averb and stasymbol. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 37344, derived from the frequency rank of both members and their visual similarity.

sei is recorded at frequency rank #36,154, classified as averb, pronounced \zaɪ̯\. st is at rank #1,190, tagged as asymbol.

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 37344, this pair ranks #263,127 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sei vs st

Shared letters: s. Private to "sei": ei. Private to "st": t.

"sei" · 3 letters · shape CVV · "st" · 2 letters · shape CC

Frequently Asked Questions

Is swapping "sei" for "st" ever safe?

No - they are not even the same part of speech. "sei" is a verb and "st" a symbol, so a sentence built for one is usually ungrammatical with the other.

In ordinary French text, does "sei" or "st" show up more?

"st" is the more common of the two: it sits at frequency rank #1,190 in our French list, against #36,154 for "sei". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

You've compared "sei" and "st". Here's where to go from here.

Full dictionary entry for "sei" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "st" - compare definitions side by side with the headword page. Word entry
This pair ranks #263,127 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"sei" and "st" also get mixed up with nearby pairs, the highest-scored neighbour is "sei vs suu". Nearby pair

Confusion rank #263,127 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.