Search deeply is a phrase that is used to describe the process of looking for something in a thorough and comprehensive manner. The term can be broken down into three crossword solutions: DELVE (5 letters), DIG (3 letters), and DREDGE (6 letters). DELVE means to investigate or explore something in detail, while DIG implies to search for something by excavating or delving into the ground. DREDGE is an even more intensive form of searching, as it involves dredging up material from the bottom of a body of water. All three words are used to describe the process of searching deeply.