Boshan, mountain in Shaanxi
嶓 is a specific proper noun: Boshan, a mountain in Shaanxi. Its meaning is purely geographical and does not extend to general mountain concepts.
嶓 combines 山 (mountain) with 番, which likely provides the sound ハ. It was created as a specific character for the mountain name Boshan.
The left side 山 means mountain, and the right side 番 looks like a numbered field. Picture a mountain in Shaanxi marked with a number: Boshan.
For ハ, imagine laughing 'ha!' when you finally reach the top of Boshan mountain: ha -> ハ.
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