admonition
Definition
A strong warning, often in words or speech, to change one's behavior, correct an action, or show something in a particular way, especially something that a person says to someone else to help them reform their behavior or become a better person.
Español Una fuerte advertencia, a menudo en palabras o discurso, para cambiar su comportamiento, corregir una acción o mostrar algo de una manera particular, especialmente algo que una persona dice a otra persona para ayudarla a reformar su comportamiento o convertirse en una persona mejor.
Example
"He gave his son a stern admonition to work harder and earn good grades."