How do you express "Watch out" in Spanish?

The phrase "Watch out" can be effectively expressed in Spanish as "¡Cuidado!" This exclamation serves as a direct warning to someone, alerting them to be cautious or to pay attention to potential danger. It is a commonly used expression in both verbal and written communication when advising someone to be aware of their surroundings or to avoid a hazard.

While other choices may communicate safety or precaution, they do not convey the same immediacy or directness as "¡Cuidado!". For example, "Ten cuidado" translates to "Be careful," which is more about advice rather than a warning. "Es obligatorio el chaleco salvavidas" means "The life jacket is mandatory," which is a statement rather than a call to immediate action. "Gira a la derecha" translates to "Turn right," which is a directional instruction and does not relate to the warning context of "Watch out." Thus, "¡Cuidado!" is the most appropriate and direct translation for expressing the urgency of "Watch out."