wet
洳 centers on being wet or damp, often describing ground or surfaces soaked with water.
洳 combines the water radical 氵 with 如, which likely contributes the sound. The character expresses wetness or dampness through the water component.
The water radical 氵 beside 如 suggests a place where water collects, making the ground wet and damp.
For ジュ, imagine a wet jewel (ジュエル) lying in a puddle: jewel -> ジュ, and the water makes it glisten.
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