This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
傐 combines the person radical 亻 with the phonetic component 高, but its exact historical development and original meaning are uncertain.
A person 亻 beside 高 (tall) might suggest a tall person, but the actual meaning is unclear.
For コウ, imagine a tall person named Kou standing beside the 高 component: Kou -> コウ.
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