ripples
渼 centers on the surface pattern of water: small ripples spreading across a liquid.
渼 combines the water radical 氵 with 美, which likely contributes the sound and the idea of something pleasing or fine, suggesting delicate ripples on water.
The water radical 氵 beside 美 (beauty) suggests beautiful water patterns: tiny ripples spreading gently.
For ビ, picture a bee skimming the water's surface, its wings making tiny ripples: bee -> ビ.
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