Sau vs sei, What's the Difference?

Which to use

“Sau” is a noun and “sei” is an intj - they look or sound alike but fill different roles in a sentence.

#49,171
“Sau” frequency rank: #118
“sei” frequency rank: 49289
confusion score

Side-by-Side Comparison

Feature	Sau	sei
Definition	porco	expressa que aquilo ouvido que foi dito ou afirmado por alguém não é tomado como sendo a verdade

Letter map: Sau vs sei

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

3 ch

sei

Grammar separator: Sau vs sei

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Sau is anoun and seianintj. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 49289, derived from the frequency rank of both members and their visual similarity.

Sau is recorded at frequency rank #49,171, classified as anoun, pronounced /zaʊ̯/. sei is at rank #118, tagged as anintj.

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 49289, this pair ranks #15,752 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of Sau vs sei

Shared letters: s. Private to "Sau": au. Private to "sei": ei.

"Sau" · 3 letters · shape CVV · "sei" · 3 letters · shape CVV

Frequently Asked Questions

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

No - they are not even the same part of speech. "Sau" is a noun and "sei" an intj, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "Sau" or "sei"?

"sei" is the more common of the two: it sits at frequency rank #118 in our Portuguese list, against #49,171 for "Sau". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Done with this confusable. These links stay specific to "Sau" and "sei".

Full dictionary entry for "Sau" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "sei" - compare definitions side by side with the headword page. Word entry
This pair ranks #15,752 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"Sau" and "sei" also get mixed up with nearby pairs, the highest-scored neighbour is "Sau vs soap". Nearby pair

Confusion rank #15,752 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.