Which to use
“sein” is a verb and “sim” is an adverb - they look or sound alike but fill different roles in a sentence.
- #43,647
- “sein” frequency rank
- #147
- “sim” frequency rank
- 43794
- confusion score
Side-by-Side Comparison
| Feature | sein | sim |
|---|---|---|
| Definition | ser, estar. | exprime afirmação, acordo, aprovação, permissão ou consentimento |
Where the eye mixes sein and sim
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses sein with sim
These two trip readers on the page rather than in the ear: sein is /zaɪ̯n/ while sim is /ˈsĩ/. 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 (verb vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 43794, derived from the frequency rank of both members and their visual similarity.
sein is recorded at frequency rank #43,647, classified as averb, pronounced /zaɪ̯n/. sim is at rank #147, tagged as anadv, pronounced /ˈsĩ/.
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 43794, this pair ranks #21,792 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sein vs sim
Shared letters: is. Private to "sein": en. Private to "sim": m.
"sein" · 4 letters · shape CVVC · "sim" · 3 letters · shape CVC
Known mistypes of this pair
- sein ← esin · seinn · seni · sien · ssein
Frequently Asked Questions
Is swapping "sein" for "sim" ever safe?
In ordinary Portuguese text, does "sein" or "sim" show up more?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "sein" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sim" - compare definitions side by side with the headword page. Word entry
- This pair ranks #21,792 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "sein" and "sim" also get mixed up with nearby pairs, the highest-scored neighbour is "sein vs slip". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #21,792 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.