burnt mountain; dormant volcano
Refers to a mountain that has been burned, often by volcanic activity, or a volcano that is currently dormant. The 'burnt mountain' sense can also describe a mountain scarred by fire.
On the slopes of the burnt mountain, vegetation hasn't grown back yet.
This dormant volcano hasn't been active for several hundred years.
Compound of 焼け (yake, 'burning, burnt', the continuative form of 焼ける yakeru 'to burn') + 山 (yama, 'mountain'). Literally 'burnt mountain'.