mountainous
BrE /ˈmaʊntɪnəs/ AmE /ˈmaʊntɪnəs/
adjective en → es
having many mountains or hills; full of mountains
montañoso, de montañas
- mountainous area/region
Collocations mountainous terrain · mountainous landscape
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The region is mountainous and difficult to reach.
La región es montañosa y difícil de alcanzar.