Which to use
“sein” is a verb and “seis” is a num - they look or sound alike but fill different roles in a sentence.
- #43,647
- “sein” frequency rank
- #542
- “seis” frequency rank
- 44189
- confusion score
Side-by-Side Comparison
| Feature | sein | seis |
|---|---|---|
| Definition | ser, estar. | número equivalente a cinco mais um; cardinalidade de um conjunto que contenha seis elementos distintos; representado pelo símbolo 6 (algarismos arábicos) ou VI (algarismos romanos) |
Where the spellings diverge
Shared letters are muted; the letters that actually set sein and seis apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
sein and seis form a confusable pair in the Portuguese index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by a single letter - n in “sein” becomes s in “seis” - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 44189, 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/. seis is at rank #542, tagged as anum.
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 44189, this pair ranks #21,345 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Frequency comparison
Frequently Asked Questions
Can "sein" and "seis" be used interchangeably?
Remembering sein vs seis
The fastest way to pick the right one every time.
- Check the role first: if you need a verb, it's “sein”; for a num, it's “seis”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “sein” entry
- Browse more pairs most likely to be confused. Most confusable