This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鉜 combines 金 (metal) with 付, which likely contributes the sound. The exact historical development is uncertain.
The left side is metal 金, and the right side is 付 (attach). Picture attaching a metal ornament as decoration, hinting at the kun-reading かざり (decoration).
For フウ, imagine a metalworker named Fuu attaching a decorative metal piece: Fuu -> フウ, and the metal ornament is attached.