The term 'in the dumps' is an idiom used to describe a feeling of sadness or depression. This phrase can be broken DOWN into eight crossword solutions: SAD (3 letters), MOROSE (6 letters), BLUE (4 letters), GLUM (4 letters), LOW (3 letters), DOWN (4 letters), MOPEY (5 letters), and SADHED (6 letters). All of these words are synonyms for feeling LOW, and the tenth letter solution, FEELINGLOW (10 letters), further emphasizes this idea.