This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The historical origin of 疁 is uncertain. It visually combines 田 (field) and 翏, but the exact development is unclear.
Since the meaning is unclear, focus on the shape: a field 田 beside the complex 翏, like a field marked with intricate patterns.
For リュ, imagine a rare field marked with the sound 'ryu' echoing across it: ryu -> リュ.