steep sloping land; steep terrain
Refers to land with a steep gradient, often used in contexts such as disaster prevention, construction regulations, or geographical descriptions.
It was designated as a steep slope failure danger zone.
Because this area has many steep slopes, it is difficult to build houses.
傾斜地 means 'sloping land' in general, while 急傾斜地 specifically emphasizes a steep slope.
急斜面 refers to a steep slope or incline as a surface, whereas 急傾斜地 refers to the land or terrain itself.
Compound of 急 (steep), 傾斜 (slope, inclination), and 地 (land, ground). The word is a straightforward technical term formed from these elements.