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ENGLISH · A WORD WITH POSSIBILITIES

mountainous.

Having many mountains; characterized by mountains; of the nature of a mountain; rough (terrain); rocky.

11 characters3 syllables approx.English language

Meaning & usage

adj/ˈmaʊn.tɪ.nəs/Received-Pronunciation/ˈmaʊn.tɪ.nəs/US/ˈmaʊn.tə.nəs/US[ˈmæʊn.tn̩.əs]US
  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.

    figuratively
  4. Inhabiting mountains; hence, barbarous.

    obsolete
Where this word comes from

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

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.