Use 'mountainous' to describe areas with many or large mountains, often for scenery or locations. The mountainous regions of Colorado attract many hikers and skiers.
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Physical Geography
'Mountainous' often refers to landscapes that may be difficult to traverse due to elevation changes. The mountainous terrain made the journey challenging.
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Symbolic References
In literature, 'mountainous' can symbolize majesty, obstacles, or an adventurous spirit. The hero's mountainous journey represented his inner struggles.