to drop, as liquids, drop
渧 centers on liquid falling in drops: to drip, drop, or let liquid fall. The given meanings all describe the same basic action of a liquid dropping.
渧 combines the water radical 氵 with 帝, which likely contributes the sound. The character is used for the idea of liquid dropping, but the exact historical development is uncertain.
The water radical 氵 beside 帝 suggests liquid falling. Picture drops of water falling from the tip of a divine emperor's (帝) scepter.
For テイ, imagine a single drop of tea (ティー) falling from the emperor's scepter: tea -> テイ, and the drop is the liquid.
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