The term 'MOST PROFOUND' can be summarized by two crossword solutions: DEEPEST (7 letters) and HEAVIEST (8 letters). DEEPEST is used to describe something that is very deep, either physically or metaphorically. It can refer to a physical depth, such as the DEEPEST part of the ocean, or a metaphorical depth, such as the depths of one's emotions. HEAVIEST is used to describe something that is very heavy, either physically or metaphorically. It can refer to a physical weight, such as the heaviest object on Earth, or a metaphorical weight, such as the heaviness of a difficult decision. Together, these two words can be used to describe something that is both very deep and very heavy, such as the most profound philosophical questions.