The crossword solution for the term 'LESSEN DRASTICALLY' is DEPLETE, which is a 7-letter word. To DEPLETE something means to reduce it significantly or to use it up completely. This term can be used in many contexts, such as reducing a resource or diminishing a feeling. In this case, the term 'LESSEN DRASTICALLY' implies that something should be reduced drastically, and the crossword solution of DEPLETE reflects this.