# anion

> English word · Noun · IPA /ˈænˌaɪ.ən/ · frequency rank #41,506

## Definitions
1. A negatively charged ion.

## Etymology
Learned borrowing from Ancient Greek ἀνιόν (anión, “(thing) going up”), neuter present participle of ἄνειμι (áneimi, “go up”), from ἀνά (aná, “up”) + εἶμι (eîmi, “go”). Coined by English polymath William Whewell in 1834 for Michael Faraday, who introduced it later that year. By surface analysis, an- (“up, away, forward”) + ion.

## Easily confused with
- **Ann** (https://plainspell.com/en/vs/anion-vs-ann)
- **Avon** (https://plainspell.com/en/vs/anion-vs-avon)
- **anon** (https://plainspell.com/en/vs/anion-vs-anon)
- **Aron** (https://plainspell.com/en/vs/anion-vs-aron)
- **axon** (https://plainspell.com/en/vs/anion-vs-axon)
- **Asian** (https://plainspell.com/en/vs/anion-vs-asian)
- **Aston** (https://plainspell.com/en/vs/anion-vs-aston)
- **Anita** (https://plainspell.com/en/vs/anion-vs-anita)
- **Anton** (https://plainspell.com/en/vs/anion-vs-anton)
- **annoy** (https://plainspell.com/en/vs/anion-vs-annoy)
- **arson** (https://plainspell.com/en/vs/anion-vs-arson)
- **apron** (https://plainspell.com/en/vs/anion-vs-apron)
- **avian** (https://plainspell.com/en/vs/anion-vs-avian)
- **axiom** (https://plainspell.com/en/vs/anion-vs-axiom)
- **Anson** (https://plainspell.com/en/vs/anion-vs-anson)
- **Annan** (https://plainspell.com/en/vs/anion-vs-annan)
- **argon** (https://plainspell.com/en/vs/anion-vs-argon)
- **Arian** (https://plainspell.com/en/vs/anion-vs-arian)
- **anise** (https://plainspell.com/en/vs/anion-vs-anise)
- **Anjou** (https://plainspell.com/en/vs/anion-vs-anjou)

## Common misspellings (6)
`ainon`, `anino`, `anionn`, `annion`, `anoin`, `naion`

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