verb

The verb "warn" means to give someone information or advice about a potential danger or problem in order to help them avoid it or be prepared for it.

Example

1. The weather service has warned residents of the coastal town to prepare for an incoming storm with strong winds and heavy rain.
2. Before starting the hike, the park ranger warned us about the dangers of the steep terrain and advised us to wear appropriate footwear and bring enough water.
3. The company's CEO sent an email to all employees warning them about a potential phishing scam that was targeting their industry, and reminded them to be vigilant with their online security practices.