Which to use
“sen” is a noun and “si” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #13,176
- “sen” frequency rank
- #482
- “si” frequency rank
- 13658
- confusion score
Side-by-Side Comparison
| Feature | sen | si |
|---|---|---|
| Definition | sonho | refere-se à terceira pessoa, indica reflexividade e é usado após preposição (a, de, em, contra, sobre, por, etc., exceto com) |
Where the eye mixes sen and si
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses sen with si
These two trip readers on the page rather than in the ear: sen is /ˈsɛn/ while si is /ˈsi/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 13658, derived from the frequency rank of both members and their visual similarity.
sen is recorded at frequency rank #13,176, classified as anoun, pronounced /ˈsɛn/. 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 13658, this pair ranks #58,619 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of sen vs si
Shared letters: s. Private to "sen": en. Private to "si": i.
"sen" · 3 letters · shape CVC · "si" · 2 letters · shape CV
Frequently Asked Questions
Do "sen" and "si" mean the same thing in a sentence?
Which is more common, "sen" or "si"?
What to do next
Eye-level mix-up between "sen" and "si" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "sen" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "si" - compare definitions side by side with the headword page. Word entry
- This pair ranks #58,619 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "sen" and "si" also get mixed up with nearby pairs, the highest-scored neighbour is "sen vs sueño". Nearby pair
Confusion rank #58,619 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.