The term 'strong WINE' can be broken down into two words, 'PORT' and 'WINE'. PORT is a type of fortified WINE that is produced in the Douro Valley in Portugal. It is made from a blend of grapes, including Touriga Nacional, Tinta Roriz, Tinta Barroca, and others. It is usually sweet and has a high alcohol content. WINE, on the other hand, is an alcoholic beverage made from fermented grapes or other fruits. It can range from dry to sweet and can have a low to high alcohol content. When combined, strong WINE is a type of fortified WINE that is made from a blend of grapes and has a high alcohol content.