cautioner
/kɔːtʃənər/Definitions
1. noun
A person who gives a warning or advice about the risks or dangers of doing something.
“The police officer acted as a cautioner, warning the driver about the speed limit.”
2. noun
A person who is responsible for cautioning or warning someone, especially in a court of law.
“The judge appointed a cautioner to warn the defendant about the consequences of their actions.”