What is murder stroke?

"Murder stroke" is a term that originated in Renaissance Italy and refers to a stabbing technique used in sword fighting. It involves thrusting the sword directly into the opponent's heart or abdomen with the intention of causing a fatal injury. The term is often used in historical fencing manuals and literature to describe a lethal or decisive strike in combat. It is important to note that the term "murder stroke" is used in a historical context and is not a commonly used term in modern fencing or martial arts.