place name
嵙 is a rare kanji used primarily in place names. Its standalone meaning is unclear beyond that geographic usage.
嵙 combines 山 (mountain) with 科, but the exact historical origin is uncertain. It likely arose as a compound for place names.
A mountain 山 with 科 below, like a mountain labeled with a category for a place name.
For カ, imagine a car driving up a mountain road to a place named with 嵙: car -> カ.