montañoso - Wiktionary, the free dictionary

From Late Latin montāniōsus, an adjective based on montānia, from Latin montem (“mountain”). By surface analysis, montaña +‎ -oso.

montañoso (feminine montañosa, masculine plural montañosos, feminine plural montañosas)

1. mountainous

Inherited from Late Latin montāniōsus, an adjective based on montānia, from Latin montem (“mountain”). By surface analysis, montaña +‎ -oso. Cognate with English mountainous.

• IPA^(key): /montaˈɲoso/ [mõn̪.t̪aˈɲo.so]
• Rhymes: -oso
• Syllabification: mon‧ta‧ño‧so

montañoso (feminine montañosa, masculine plural montañosos, feminine plural montañosas)

1. mountainous

• “montañoso”, in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014