This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
瓫 combines 分 (divide) and 瓦 (tile/earthenware). The exact historical development is uncertain, but it likely relates to a type of earthenware vessel.
The top 分 suggests dividing, and the bottom 瓦 is earthenware. Picture dividing clay into pieces to make pottery, but the exact meaning is uncertain.
For ホン, imagine a potter honing a clay vessel: hone -> ホン, while shaping the earthenware 瓦.