The crossword solution for the term BARK BACK is STERN, which is a five-letter word. The term 'STERN' is an adjective that describes someone or something as serious, strict, and unyielding. It is often used to describe a person's attitude or demeanor, such as a STERN parent or teacher. It can also be used to describe a situation, such as a STERN warning or a STERN reprimand. In this context, the term BARK BACK implies a STERN response to something.