Sing the Blues is an expression used to describe a feeling of sadness and depression. It is often associated with the genre of blues music, which originated in the African-American communities of the Southern United States in the late 19th and early 20th centuries. The crossword solutions for the term Sing the Blues are LAMENT (6 letters), WAIL (4 letters), MOPE (4 letters), and REPINE (6 letters). LAMENT means to express grief or sorrow, WAIL is to make a prolonged, high-pitched cry, MOPE is to be listless and dejected, and REPINE is to express discontent or ill temper.