soda
1.
2. a. Carbonated water. b. Northeastern U.S.. See soft drink. See Regional Note at tonic.
3. A refreshment made from carbonated water, ice cream, and usually a flavoring.
4. Games. The card turned face up at the beginning of faro.
[Middle English sode, soda, saltwort, soda, from Old Italian soda, perhaps from Arabic suwwād, saltwort.]