This is the 1632nd most frequent German word.
warnen
"Warnen" means "to warn."
In this sentence, 'warnen' is used to caution someone about a potential risk or danger.
Ich warne dich vor der Gefahr.
I warn you about the danger.
Here, 'warnen' is employed to advise someone to maintain a certain behavior or state of awareness.
Der Lehrer warnte die Schüler, aufmerksam zu bleiben.
The teacher warned the students to stay attentive.
In this example, 'warnen' communicates an alert regarding an upcoming event to a group of people.