# mountainous

> English word · Adjective · IPA /ˈmaʊn.tɪ.nəs/ · frequency rank #17,681

## Definitions
1. Having many mountains; characterized by mountains; of the nature of a mountain; rough (terrain); rocky.
2. Resembling a mountain, especially in size; huge; towering.
3. Very difficult.
4. Inhabiting mountains; hence, barbarous.

## Etymology
From mountain + -ous after Middle French montagneux, from Late Latin montāniōsus, from montānia, from Latin montem (“mountain”).

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

## Common misspellings (15)
`mmountainous`, `monutainous`, `mounatinous`, `mounntainous`, `mountainnous`, `mountainosu`, `mountainouss`, `mountainuos`, `mountaionus`, `mountanious`, `mountianous`, `mounttainous`, `moutnainous`, `muontainous`, `omuntainous`

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