This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 攊 is uncertain. It visually contains 扌 (hand) and 歷, but the original semantic and phonetic roles are unclear.
The hand radical 扌 beside 歷 suggests an action involving the hand, but the specific meaning is unclear.
For リャク, imagine a hand 扌 making a quick, sharp flicking motion that sounds like 'ryak': ryak -> リャク.