seuvssiWhat's the difference?

Quick tell: seu is a noun, si is a pronoun, so they fill different roles in a sentence.

Which to use

“seu” is a noun and “si” is a pronoun - they look or sound alike but fill different roles in a sentence.

#31
“seu” frequency rank
#482
“si” frequency rank
513
confusion score

Side-by-Side Comparison

Feature seu si
Definition senhor refere-se à terceira pessoa, indica reflexividade e é usado após preposição (a, de, em, contra, sobre, por, etc., exceto com)

Letter map: seu vs si

Shared letters muted; letters that set seu and si apart highlighted. Shared run: 1.

3 ch
seu
2 ch
si

Spelling & Dictionary Insight

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: seu is anoun and siapronoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 513, derived from the frequency rank of both members and their visual similarity.

seu is recorded at frequency rank #31, classified as anoun. si is at rank #482, tagged as apron, pronounced /ˈsi/.

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 513, this pair ranks #75,154 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of seu vs si

Shared letters: s. Private to "seu": eu. Private to "si": i.

"seu" · 3 letters · shape CVV  ·  "si" · 2 letters · shape CV

Frequently Asked Questions

Can "seu" and "si" be used interchangeably?
No - they are not even the same part of speech. "seu" is a noun and "si" a pronoun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "seu" or "si"?
"seu" is the more common of the two: it sits at frequency rank #31 in our Portuguese list, against #482 for "si". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list