Threat (noun)

1. A statement of an intention to inflict pain, injury, damage, or other hostile action on someone in retribution for something done or not done.
2. An expression of intention to harm or punish another, or a declaration of war.
3. A potential danger or risk.
4. A person or thing likely to cause damage or danger.
5. A warning or indication of a possible future event.

Origin:

Middle english: from old english threát "oppression, affliction", of germanic origin; related to dutch dreiging and german drohung.

Examples:

1. The kidnapper made a threat to kill the hostages if his demands were not met.
2. The storm is a threat to coastal areas.
3. The company is facing a threat from new competitors.
4. The terrorist threat is high in the city.
5. The spread of the disease is a threat to public health.