Reflecting deeply is an important part of personal growth and development. Mulling over a situation or idea can help to gain insight and understanding, while musing on it can lead to creative solutions. The crossword solutions for the term 'reflect deeply' are 'MULL' and 'MUSE'. Mulling is a form of deep contemplation, while musing is a form of creative thinking. Both activities involve taking the time to reflect deeply on a subject.