# rationalise

> English word · Verb · IPA /ˈɹæʃ.ə.nə.laɪz/ · frequency rank #62,439

## Definitions
1. Non-Oxford British English standard spelling of rationalize.

## Etymology
From French rationaliser. By surface analysis, rational + -ise.

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