This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
嵿 combines 山 (mountain) with 頂 (summit, top), likely reinforcing the idea of a mountain peak. The exact historical development is uncertain.
A mountain 山 sitting directly on top of a summit 頂 suggests the highest point of a peak, but its actual meaning is unclear.
For テイ, imagine a tea stall at the very top of the mountain: tea → テイ, and you sip it at the summit.
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