# irrational

> English word · Adjective · IPA /ɪˈɹæʃ.(ə.)nəl/ · frequency rank #13,741

## Definitions
1. Not rational; unfounded, nonsensical or wrong-headed.
2. Of a real number, that cannot be written as the ratio of two integers.

## Etymology
From Latin irratiōnālis, from ir- + ratiōnālis.

## Easily confused with
- **irrationally** (https://plainspell.com/en/vs/irrational-vs-irrationally)

## Common misspellings (12)
`irartional`, `irational`, `irraitonal`, `irratinoal`, `irratioanl`, `irrationall`, `irrationla`, `irrationnal`, `irratoinal`, `irrattional`, `irrtaional`, `rirational`

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