This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
椱 is a rare character combining 木 (tree/wood) with 复, which likely contributes a phonetic element. The exact historical development and original meaning are uncertain.
With no clear meaning, picture a wooden (木) structure that repeats (复 suggests repetition in other kanji) — perhaps a wooden frame or part of a loom, but treat this as a guess.
For フウ, imagine a wooden flute (フルート) that makes a 'fuu' sound when blown: fuu -> フウ, tied to the wood radical 木.