# jack

> English word · Noun · IPA /d͡ʒæk/ · frequency rank #1,604

## Definitions
1. A coarse medieval coat of defence, especially one made of leather.

## Etymology
Inherited from Middle English jakke, from Anglo-Norman jacke, Middle French jaque, jacque, from jacques (“peasant”), from the proper name Jacques. Compare jacquerie.

## Easily confused with
- **JK** (https://plainspell.com/en/vs/jack-vs-jk)
- **Jan** (https://plainspell.com/en/vs/jack-vs-jan)
- **jay** (https://plainspell.com/en/vs/jack-vs-jay)
- **jam** (https://plainspell.com/en/vs/jack-vs-jam)
- **jaw** (https://plainspell.com/en/vs/jack-vs-jaw)
- **jar** (https://plainspell.com/en/vs/jack-vs-jar)
- **JFK** (https://plainspell.com/en/vs/jack-vs-jfk)
- **Jai** (https://plainspell.com/en/vs/jack-vs-jai)
- **Jax** (https://plainspell.com/en/vs/jack-vs-jax)
- **jag** (https://plainspell.com/en/vs/jack-vs-jag)
- **Jap** (https://plainspell.com/en/vs/jack-vs-jap)
- **Jas** (https://plainspell.com/en/vs/jack-vs-jas)
- **Jah** (https://plainspell.com/en/vs/jack-vs-jah)
- **jail** (https://plainspell.com/en/vs/jack-vs-jail)
- **Jane** (https://plainspell.com/en/vs/jack-vs-jane)
- **jazz** (https://plainspell.com/en/vs/jack-vs-jazz)
- **jake** (https://plainspell.com/en/vs/jack-vs-jake)
- **junk** (https://plainspell.com/en/vs/jack-vs-junk)
- **Java** (https://plainspell.com/en/vs/jack-vs-java)
- **jerk** (https://plainspell.com/en/vs/jack-vs-jerk)

## Common misspellings (6)
`ajck`, `jacck`, `jackk`, `jakc`, `jcak`, `jjack`

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