This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
篈 combines 竹 (bamboo) with 封, but the historical origin and original meaning are uncertain. It may have been a specialized character for a bamboo-related object or name.
The top 竹 suggests bamboo, and the bottom 封 suggests sealing or enclosing. Picture a bamboo container used for sealing something, though the true meaning is unknown.
For ホウ, imagine a bamboo seal stamped with the sound 'hoe' (ホウ) as it closes a container.
—