to leave well alone
01
to not try to interfere or make changes in a situation or with something that is already functioning satisfactorily to avoid causing unnecessary problems
![to [leave|let] well alone definition and meaning](https://cdn.langeek.co/photo/46655/original/?type=jpeg "to [leave|let] well alone definition and meaning")
idiom
informal
예시들
Every time they change the booking system, something breaks; they should leave well alone.
