"Did Not Finish" (DNF) is a term commonly used in competitive sports, particularly in events like marathons, triathlons, and cycling races. It indicates that a participant started the event but did not complete it for various reasons, such as injury, fatigue, or other unforeseen circumstances. A DNF is recorded in official results, signifying that the athlete was unable to finish the race. In addition to individual sports, DNF can also apply to team events or challenges. For example, in Ironman competitions, athletes may face extreme conditions that lead to a DNF. Understanding the reasons behind a DNF can help athletes improve their training and preparation for future events.