Which to use
“sei” is a num and “sim” is a verb - they look or sound alike but fill different roles in a sentence.
- #48,072
- “sei” frequency rank
- #14,009
- “sim” frequency rank
- 62081
- confusion score
Side-by-Side Comparison
| Feature | sei | sim |
|---|---|---|
| Definition | Seis. | Primera persona del singular del presente activo de subjuntivo de sum. |
Where the eye mixes sei and sim
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. sei (CVV) and sim (CVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Visual trap between sei and sim
These two trip readers on the page rather than in the ear: sei is /s̺ej/ while sim is /ˈsim/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (num vs verb), which is usually the fastest check. Our composite confusion score for this pair is 62081, derived from the frequency rank of both members and their visual similarity.
sei is recorded at frequency rank #48,072, classified as anum, pronounced /s̺ej/. sim is at rank #14,009, tagged as averb, pronounced /ˈsim/.
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 62081, this pair ranks #53,205 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of sei vs sim
Shared letters: is. Private to "sei": e. Private to "sim": m.
"sei" · 3 letters · shape CVV · "sim" · 3 letters · shape CVC
Frequently Asked Questions
Do "sei" and "sim" mean the same thing in a sentence?
Which is more common, "sei" or "sim"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "sei" 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 #53,205 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "sei" and "sim" also get mixed up with nearby pairs, the highest-scored neighbour is "sei vs stem". Nearby pair
Confusion rank #53,205 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.