Which to use
“sein” is a verb and “sine” is a preposition - they look or sound alike but fill different roles in a sentence.
- #45,601
- “sein” frequency rank
- #39,994
- “sine” frequency rank
- 85595
- confusion score
Side-by-Side Comparison
| Feature | sein | sine |
|---|---|---|
| Definition | Ser, estar. | Sin. |
Where the eye mixes sein and sine
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. sein (CVVC) and sine (CVCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Look-alike desk: sein vs sine
These two trip readers on the page rather than in the ear: sein is [ˈzaɪ̯n] while sine is [ˈsɪ.nɛ]. Spoken aloud the problem disappears. In writing it persists, because they are an anagram pair: the same letters reordered, and the parts of speech differ too (verb vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 85595, derived from the frequency rank of both members and their visual similarity.
sein is recorded at frequency rank #45,601, classified as averb, pronounced [ˈzaɪ̯n]. sine is at rank #39,994, tagged as aprep, pronounced [ˈsɪ.nɛ].
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 85595, this pair ranks #5,990 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of sein vs sine
Shared letters: eins. Private to "sein": -. Private to "sine": -.
"sein" · 4 letters · shape CVVC · "sine" · 4 letters · shape CVCV
Known mistypes of this pair
Frequently Asked Questions
Do "sein" and "sine" mean the same thing in a sentence?
In ordinary Spanish text, does "sein" or "sine" show up more?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "sein" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sine" - compare definitions side by side with the headword page. Word entry
- This pair ranks #5,990 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "sein" and "sine" also get mixed up with nearby pairs, the highest-scored neighbour is "sei vs sein". 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 #5,990 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.