roll
礧 centers on the idea of rolling, especially of heavy objects like stones. The single given meaning 'roll' is the core concept.
礧 combines 石 (stone) with 畾, which likely contributes the sound and may relate to piling up or rolling. The exact historical development is uncertain.
The left side 石 means stone, and the right side 畾 looks like stacked fields or piled things. Imagine heavy stones being rolled down a hill, tumbling over each other.
For ライ, picture a rolling stone that lies at the bottom of a hill: lie -> ライ, and the stone rolls to rest.
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