Be a Kvetch is an expression used to describe someone who complains or nags constantly. The term can be broken down into three crossword solutions: CARP (4 letters), WHINE (5 letters), and GROUSE (6 letters). CARP means to find fault or complain persistently, WHINE is to express discontent in a high-pitched voice, and GROUSE is to express dissatisfaction or annoyance. Therefore, Be a Kvetch is an expression used to describe someone who constantly finds fault, expresses discontent, and expresses dissatisfaction or annoyance.