The term 'Gradually Weaken' can be represented by three crossword solutions: SAP (3 letters), LAG (3 letters), and ERODE (5 letters). SAP is an acronym for Systems, Applications, and Products in Data Processing, which is a software package used to manage business operations. LAG is a verb meaning to move or develop more slowly than others. ERODE is a verb meaning to gradually reduce or destroy something through a slow process. Together, these three words represent the idea of Gradually Weaken, as they all refer to a gradual process of destruction or weakening.