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Added 9 October 2026

mountainous

/ˈmaʊn.tɪ.nəs/ adjective

In Latin: montōsus Wiktionary

adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about mountainous at Wordnik → Where our words come from →

Having many mountains; characterized by mountains; of the nature of a mountain; rough (terrain); rocky.
Resembling a mountain, especially in size; huge; towering.
Very difficult.

Origin

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

From Wiktionary, via Kaikki.org (CC BY-SA)

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