This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 蛗 is uncertain. It contains the insect radical 虫, suggesting a connection to insects or small creatures, but the upper component's origin is unclear.
The insect radical 虫 at the bottom hints at a bug or small creature, but the overall meaning is obscure. Picture a rare, unidentifiable insect with an unusual upper body shape.
For フウ, imagine a strong wind (風, ふう) blowing this rare insect away: 風 -> フウ, and the bug disappears in the gust.
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