The crossword solutions for the term 'Truly, Madly, or DEEPLY' are 'DEEPLY' (6 letters). This phrase is a popular idiom that is used to emphasize the intensity of an emotion or feeling. It is often used to express love and affection, but can also be used to describe other strong emotions such as anger or fear. The phrase has been used in many different contexts, from literature to film, and is a popular way to express intense feelings.