What term best describes a situation that is not safe?

The term "dangerous" best describes a situation that is not safe because it indicates an active threat to safety that can result in injury or harm. When a situation is labeled as dangerous, it explicitly communicates that there is a significant risk posed to individuals or property, often requiring immediate attention or avoidance.

While "hazardous," "risky," and "unsafe" also relate to safety concerns, they carry slightly different implications. "Hazardous" refers to a specific danger that has the potential to cause harm but does not necessarily imply an immediate threat. "Risky" emphasizes the likelihood of danger occurring but might not directly convey the severity or immediacy of harm. "Unsafe" denotes a lack of safety but may not communicate the degree of danger present in the scenario. Thus, "dangerous" encompasses a broader and more immediate understanding of a lack of safety.