rainbow
螮 centers on the rainbow, a luminous arc in the sky. The meaning is specific and visual, without broad abstract extensions.
螮 combines 虫 (insect) with 帶 (belt/sash), but the exact historical reason for this combination is uncertain. It may be a phono-semantic compound where 帶 contributes the sound and the insect radical relates to the rainbow's serpentine shape, but this is speculative.
Imagine a rainbow as a giant, colorful insect (虫) wearing a sash (帶) across the sky. The insect's curved body forms the arc, and the sash adds the bands of color.
For テイ, picture a rainbow shaped like the letter T (ティー) arching over the landscape. The T-shape cues テイ while the rainbow glows.
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