mountainous
/ˈmaʊn.tɪ.nəs/ adjective B2- 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.
From the library
Her profound familiarity with the rugged topography of the mountainous regions ensured the safe passage of the expedition through notoriously treacherous passes.
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