admonition

noun
UK /ˌæd.məˈnɪʃ.ən/
US /ˌæd.məˈnɪʃ.ən/

A gentle warning that tells you to be careful or do better.

The teacher gave the class a friendly admonition to walk quietly in the hall.


OTHER MEANINGS

2. A firm scolding given by someone in authority.

The coach's admonition made the players practice harder.

3. A piece of earnest advice offered to guide someone's behavior.

Her grandmother's admonition to save money stayed with her for years.

4. A mild but serious reminder of a rule or duty.

The sign at the pool was an admonition to swim only when a lifeguard was present.