# sei

> English word · Noun · IPA /seɪ/ · frequency rank #34,681

## Definitions
1. A sei whale.

## Etymology
From sei whale, from Norwegian seihval, seikval, from sei (“pollock”) + hval (“whale”). Doublet of saithe.

## Easily confused with
- **so** (https://plainspell.com/en/vs/sei-vs-so)
- **SI** (https://plainspell.com/en/vs/sei-vs-si)
- **SS** (https://plainspell.com/en/vs/sei-vs-ss)
- **SP** (https://plainspell.com/en/vs/sei-vs-sp)
- **su** (https://plainspell.com/en/vs/sei-vs-su)
- **sf** (https://plainspell.com/en/vs/sei-vs-sf)
- **sh** (https://plainspell.com/en/vs/sei-vs-sh)
- **SM** (https://plainspell.com/en/vs/sei-vs-sm)
- **SW** (https://plainspell.com/en/vs/sei-vs-sw)
- **SL** (https://plainspell.com/en/vs/sei-vs-sl)
- **SG** (https://plainspell.com/en/vs/sei-vs-sg)
- **SK** (https://plainspell.com/en/vs/sei-vs-sk)
- **SV** (https://plainspell.com/en/vs/sei-vs-sv)
- **SJ** (https://plainspell.com/en/vs/sei-vs-sj)
- **Sy** (https://plainspell.com/en/vs/sei-vs-sy)
- **she** (https://plainspell.com/en/vs/sei-vs-she)
- **set** (https://plainspell.com/en/vs/sei-vs-set)
- **six** (https://plainspell.com/en/vs/sei-vs-six)
- **son** (https://plainspell.com/en/vs/sei-vs-son)
- **sex** (https://plainspell.com/en/vs/sei-vs-sex)

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