# acidity

> English word · Noun · IPA /əˈsɪd.ᵻ.ti/ · frequency rank #22,274

## Definitions
1. The quality or state of being acid.
2. Sourness; tartness; sharpness to the taste.
3. Excessive acid quality, as in gastric secretions.
4. A caustic, sour, biting, or bitter quality.

## Etymology
From French acidité, from Latin aciditātem, accusative singular of aciditās (“sourness, acidity”), from acidus (“sour, acid”). Equivalent to acid + -ity.

## Easily confused with
- **acuity** (https://plainspell.com/en/vs/acidity-vs-acuity)
- **agility** (https://plainspell.com/en/vs/acidity-vs-agility)
- **activity** (https://plainspell.com/en/vs/acidity-vs-activity)
- **acidic** (https://plainspell.com/en/vs/acidic-vs-acidity)
- **ability** (https://plainspell.com/en/vs/ability-vs-acidity)

## Common misspellings (10)
`accidity`, `acdiity`, `aciddity`, `aciditty`, `acidityy`, `acidiyt`, `acidtiy`, `aciidty`, `aicdity`, `caidity`

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