rebrew, ferment again
酘 centers on repeating a fermentation process: brewing again or re-fermenting something that has already been brewed once.
酘 combines 酉 (sake jar, relating to alcohol or fermentation) with 殳, which likely contributes the sound トウ. The character expresses the idea of re-fermenting or brewing again.
The sake jar 酉 on the left holds the brew, and the right side 殳 looks like a tool for stirring or working the mash. Picture someone using a tool to stir the jar and start a second fermentation.
For トウ, imagine a brewer tasting the re-fermented sake and saying it has a deep, rich tone: tone -> トウ, like the flavor deepens with a second brew.