high & steep
峭 centers on a steep, sharply rising slope or cliff, conveying a sense of high and precipitous terrain.
峭 combines 山 (mountain) with 肖, which likely contributes the sound and the idea of small or sharp, together suggesting a steep mountain feature.
The left side is a mountain 山, and the right side 肖 looks like a sharp, pointed shape. Picture a mountain with a small, sharp peak rising steeply: 峭 is high and steep.
For ショウ, imagine a steep mountain path so narrow you must show great care: show -> ショウ, and the mountain is high and steep.