stumming

Verb

stum (third-person singular simple present stums, present participle stumming, simple past and past participle stummed)

1. (obsolete, transitive) To ferment.
2. (obsolete, transitive) To renew (wine etc.) by mixing must with it and raising a new fermentation.
   • We stum our crude wines […]to renew their spirits.1696, John Floyer, The praeternatural State of animal Hurnours described by their sensible Qualities
3. (obsolete, transitive) To fume, as a cask of liquor, with burning sulphur.
   • Since I have taken this method with cyder, it has proved more like wine than common drink, but then I racked it off a second and a third time, as soon as it appeared fine, and then stummed the cask that received it the lasttime […]1789, “Cultivation of the Vine”, in Transactions of the American Philosophical Society, volume 1

See all 6 meanings of stum