1) Wine terminology 
Mutage J {respell|MEW|tij} is a wine making technique for making sweet wines. == Typical mechanism == The typical process involves the addition of alcohol to the must so that the fermentation process is prematurely stopped. Most yeast dies when the alcohol content in their environment is raised to approximately 13-15%. By stopping the fermentation...
• (n.) A process for checking the fermentation of the must of grapes.
Mu'tage noun [ French] A process for checking the fermentation of the must of grapes. 
French for stopping fermentation.