leaven, yeast, wine
酴 centers on fermentation: the leaven or yeast that transforms ingredients into wine, and by extension the wine itself.
酴 combines 酉 (wine jar, fermentation) with 余, which likely contributes the sound. The character is associated with leaven and fermented wine.
The wine jar 酉 on the left holds the fermenting mixture, while 余 on the right suggests the extra something—yeast—that makes it bubble into wine.
For ト, picture a toe accidentally dipped into the wine jar: toe -> ト, and the yeast starts working on the toe too.