This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
廙 combines 广 (building) with 異, but the exact historical development and original meaning are uncertain.
The outer 广 suggests a building, and the inner 異 looks like a complex, unusual object. Imagine a mysterious structure with something strange inside, but its exact purpose is unclear.
For ヨク, picture a yoke (ヨク) hanging inside the building, a strange tool whose use is uncertain.