cautionary
adjectiveUK /ˈkɔːʃənəri/
US /ˈkɔːʃəneri/
A cautionary story or warning tells you to be careful so you don't get hurt.
The teacher told a cautionary tale about a boy who never did his homework.
OTHER MEANINGS
2. Serving as a warning to others about what might happen.
The sign was a cautionary reminder to slow down on the icy road.
3. Intended to teach people to avoid mistakes by showing bad examples.
The movie is a cautionary story about spending too much money.
4. Giving advice to be careful about something.
She gave a cautionary note about the slippery steps.