# concussion

> English word · Noun · IPA /kənˈkʌʃən/ · frequency rank #13,689

## Definitions
1. A violent collision or shock.
2. An injury to part of the body, most especially the brain, caused by a violent blow, followed by loss of function.
3. The unlawful forcing of another by threats of violence to yield up something of value.

## Etymology
From Latin concussiō. Equivalent to concuss + -ion.

## Easily confused with
- **confusion** (https://plainspell.com/en/vs/concussion-vs-confusion)
- **confession** (https://plainspell.com/en/vs/concussion-vs-confession)
- **conclusion** (https://plainspell.com/en/vs/conclusion-vs-concussion)
- **concession** (https://plainspell.com/en/vs/concession-vs-concussion)

## Common misspellings (14)
`cconcussion`, `cnocussion`, `cocnussion`, `conccussion`, `concsusion`, `concusion`, `concusison`, `concussino`, `concussionn`, `concussoin`, `concustion`, `conncussion`, `conucssion`, `ocncussion`

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