This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
玢 combines 王 (jade) with 分 (divide), likely indicating a type of jade or a jade-related quality, but the exact historical development is uncertain.
The left side 王 suggests jade, and the right side 分 suggests dividing. Picture a piece of jade being split, but its meaning remains obscure.
For ヒン, imagine a rare jade artifact displayed in a museum, and a visitor whispers 'hin' in awe: hin -> ヒン.