The term 'far down' can be described in a variety of ways, such as DEEPLY (6 letters), DEEP (4 letters), ABYSMAL (7 letters), BENEATH (7 letters), and SUBMARINE (9 letters). All of these words refer to something that is located at a great depth or below the surface. DEEPLY and DEEP refer to something that is situated far below the surface, while ABYSMAL and BENEATH refer to something that is located even further down. SUBMARINE is the most extreme example, referring to something that is located underwater.