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to teach somebody a lesson
01
to hurt or punish someone in a way that ensures one they will never repeat their past behavior
![to [teach] {sb} a lesson definition and meaning](https://cdn.langeek.co/photo/43550/original/?type=jpeg "to [teach] {sb} a lesson definition and meaning")
Idiom
Informal
Example
After his reckless driving caused an accident, he finally learned his lesson about the importance of safe driving.
The manager decided to teach the lazy employee a lesson by assigning him extra tasks.
