STUM (2)

stum (2). Stum, v.t. to renew wine by new fermentation

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Stum, v. t. [imp. & p. p. Stummed (?); p. pr. & vb. n. Stumming.] To renew, as wine, by mixing must with it and raising a new fermentation. We stum our wines to renew their spirits. Floyer.