MOUNTAINOUS
mountainous
(adjective) containing many mountains
mountainous
(adjective) like a mountain in size and impressiveness; “mountainous waves”; “a mountainous dark man”
cragged, craggy, hilly, mountainous
(adjective) having hills and crags; “hilly terrain”
Source: WordNet® 3.1
Etymology
Adjective
mountainous (comparative more mountainous, superlative most mountainous)
Having many mountains; characterized by mountains; of the nature of a mountain; rough (terrain); rocky.
Resembling a mountain, especially in size; huge; towering.
(figurative, of a problem or task) Very difficult.
(obsolete) Inhabiting mountains; hence, barbarous.
Synonyms
• See also gigantic
Source: Wiktionary
Moun"tain*ous, a. Etym: [F. montagneux, L. montaniosus.]
1. Full of, or containing, mountains; as, the mountainous country of
the Swiss.
2. Inhabiting mountains. [Obs.] Bacon.
3. Large as, or resembling, a mountain; huge; of great bulk; as, a
mountainous heap. Prior.
Source: Webster’s Unabridged Dictionary 1913 Edition