The term LIKE FINE BALSAMIC VINEGAR can be summarized by the word AGED, which is a 4 letter word. Balsamic vinegar is a type of vinegar made from grape must, which is the juice of grapes that have been pressed to extract their liquid. It is AGED in wooden barrels for a minimum of 12 years, giving it a sweet and sour flavor. AGED balsamic vinegar is considered to be of higher quality than younger varieties.