warn

This term conveys a sense of urgency and protective intent, acting as a preemptive strike against potential failure or harm. It differs from simply informing or telling because it carries an implicit weight of risk, suggesting that the recipient should change their behavior or prepare for a negative outcome to avoid a specific consequence.

In professional or legal contexts, the word takes on a more formal, authoritative tone, often serving as an official notice of pending disciplinary action or a legal ultimatum. While it is generally helpful, it can also be used as a threat when the speaker implies they will take action if the warned party does not comply.