# sein

> Portuguese word · Verb · IPA /zaɪ̯n/ · frequency rank #43,647

## Definitions
1. ser, estar.
2. verbo auxiliar do pretérito perfeito para verbos de movimento

## Easily confused with
- **si** (https://plainspell.com/pt/vs/sein-vs-si)
- **ser** (https://plainspell.com/pt/vs/sein-vs-ser)
- **seu** (https://plainspell.com/pt/vs/sein-vs-seu)
- **sem** (https://plainspell.com/pt/vs/sein-vs-sem)
- **sim** (https://plainspell.com/pt/vs/sein-vs-sim)
- **set** (https://plainspell.com/pt/vs/sein-vs-set)
- **sun** (https://plainspell.com/pt/vs/sein-vs-sun)
- **sex** (https://plainspell.com/pt/vs/sein-vs-sex)
- **sic** (https://plainspell.com/pt/vs/sein-vs-sic)
- **sin** (https://plainspell.com/pt/vs/sein-vs-sin)
- **Sri** (https://plainspell.com/pt/vs/sein-vs-sri)
- **sen** (https://plainspell.com/pt/vs/sein-vs-sen)
- **ski** (https://plainspell.com/pt/vs/sein-vs-ski)
- **shi** (https://plainspell.com/pt/vs/sein-vs-shi)
- **sie** (https://plainspell.com/pt/vs/sein-vs-sie)
- **seja** (https://plainspell.com/pt/vs/sein-vs-seja)
- **será** (https://plainspell.com/pt/vs/sein-vs-sera)
- **seis** (https://plainspell.com/pt/vs/sein-vs-seis)
- **sexo** (https://plainspell.com/pt/vs/sein-vs-sexo)
- **sete** (https://plainspell.com/pt/vs/sein-vs-sete)

## Common misspellings (5)
`esin`, `seinn`, `seni`, `sien`, `ssein`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/pt/word/sein