sei
The verdict
“sei” sits in 20 confusable pairs (corpus #118) as an interjection. The look-alike neighbours are the real trap.
- #118
- frequency rank, Portuguese
- 1,185
- “S” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - expressa que aquilo ouvido que foi dito ou afirmado por alguém não é tomado como sendo a verdade
Corpus desk
Index PT-sei · sei · Portuguese
sei · rank #118 · 0 variants · 20 confusables
- FREQ-CORE #118
- LEN-MID 3 letters
- VOW-2 2 vowels
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 1,185
- PHOTO-FINISH hoje
Nearest frequency peer: hoje (-1 rank slots)
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Vizinhos de frequência do confusável “sei”
Pares de peso semelhante no corpus, aparte dos confusáveis abaixo
- parte
parte
99,887 corpus weight
- hoje
hoje
99,884 corpus weight
- sei
sei
99,883 corpus weight
- tão
tão
99,882 corpus weight
- então
então
99,881 corpus weight
- nem
nem
99,880 corpus weight
What this shows As barras situam “sei” face aos lemas portugueses mais próximos por rank, não um reprint da secretária de confusáveis.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | sei |
| Language | Portuguese |
| Part of speech | Interjection |
| Letters | 3 |
| Frequency rank | #118 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Rank de corpus junto a confusáveis de “sei”
Easy to mix with look-alikes
The spelling risk for sei is neighbouring look-alikes ("só", "si", …), not just typos; it is aninterjection. Frequency #118 among 1,185 “S” headwords. Gloss: "expressa que aquilo ouvido que foi dito ou afirmado por alguém não é tomado como sendo a verdade".
sei doesn't appear in our generated misspelling index, and the word's spelling is regular enough that our generator found nothing worth flagging. It also participates in 20 confusable-pair relationships, "só", "si", "su", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
This headword's origin isn't recorded in our source data, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct Portuguese form is sei, spelled S-E-I.
Definition
- 1expressa que aquilo ouvido que foi dito ou afirmado por alguém não é tomado como sendo a verdade
Recorded use
Wiktionary exampleThese source excerpts show how sei appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Eu e ela só estávamos conversando dentro do carro
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 Portuguese corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "sei"?
What does "sei" mean?
What words are commonly confused with "sei"?
What language does "sei" come from?
Is PlainSpell free to use?
Similar Portuguese words by spelling shape
Same letter count and similar misspelling depth for "sei", not the corpus desk frequency band.