# rigorous

> English word · Adjective · IPA /ˈɹɪɡəɹəs/ · frequency rank #11,597

## Definitions
1. Showing, causing, or favoring rigour/rigor; scrupulously accurate or strict; thorough.
2. Severe; intense.

## Etymology
Inherited from Middle English rigorous, from Middle French and Anglo-Norman rigoreus, derived from Late Latin rigōrōsus (stiff, rigid; inflexible). By surface analysis, rigor + -ous.

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

## Common misspellings (11)
`irgorous`, `rgiorous`, `riggorous`, `rigoorus`, `rigorosu`, `rigorouss`, `rigorrous`, `rigoruos`, `rigroous`, `riogrous`, `rrigorous`

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