# reasonability

> English word · Noun

## Definitions
1. The state or quality of being reasonable.

## Etymology
From reason(able) + -ability. Compare Middle English unresonabiltee, unresonabylite, whence unreasonability. Piecewise doublet of rationability.

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