drunken babbling, offer
酳 centers on offering wine or drink, often in a ritual or social context. The sense of drunken babbling is a less common extension, likely from the effects of such drinking.
酳 combines 酉 (wine vessel) with a phonetic element that likely contributed the sound. The exact historical development of the right side is uncertain, but the character is associated with offering wine.
The wine vessel 酉 on the left pours out an offering, while the top 幺 suggests a thread or continuation, as in a ritual pouring. Together they show wine being offered, which can lead to drunken babbling.
For シン, imagine offering a glass of wine to a friend named Shin: Shin -> シン, and the wine flows freely.
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