The crossword solution for the term EXTENDS FARTHER DOWN is DEEPENS, which is a 7-letter word. Deepens is an action verb that means to make something deeper or more intense. It can be used to describe a physical change, such as deepening a hole in the ground, or an emotional change, such as deepening a relationship. In this context, it is likely being used to describe a physical change, as extending farther down implies a downward movement.