tower, soar
峙 centers on standing tall and upright like a mountain peak: towering, soaring, or rising steeply above the surroundings.
峙 combines 山 (mountain) with 寺, which likely contributes the sound ジ and the idea of something standing firmly. The exact historical development of 寺 in this character is uncertain.
A mountain 山 beside a temple 寺: picture a temple perched on a steep peak, towering over the landscape.
For ジ, imagine a towering mountain that looks like the letter G: G -> ジ, and the mountain soars upward.