山岳地帯

1. Origins, structure, and basic meaning

• Structure: 山岳地帯(さんがくちたい) means a mountainous region containing ranges or groups of mountains.
• Basic usage: It is used when describing weather changes in the mountains or a survey team crossing rugged terrain.

2. Common pitfalls and similar expressions

• A tendency to change
  • 変わりやすい means prone to change, describing a tendency in the weather.
• Traveling on foot
  • 徒歩で means on foot. After 徒歩(とほ), で marks the means of travel.