I. ˈstəm transitive verb
( stummed ; stummed ; stumming ; stums )
Etymology: Dutch stommen, from stom, n.
archaic : to renew (wine) by mixing with must and reviving fermentation
II. noun
( -s )
Etymology: Dutch stom (approximate translation of French muet in vin muet stum), from stom, adjective, mute, from Middle Dutch; akin to Old Frisian stumm mute, Old High German stum mute, Old English stamerian to stammer
: unfermented or partly fermented grape juice ; especially : must in which fermentation has been artificially arrested