Definition
- C2
To behave in an uncontrolled or unrestrained manner, often without supervision or discipline.
（尤指儿童）放肆胡闹
Since their parents started letting the kids decide their own schedules, they have started to run wild.
自从他们的父母开始让孩子们自己决定作息时间后，他们就开始放纵无度。
Without any rules, the little boy would just run wild.
没有任何规矩，这个小男孩就会完全失控。
The project started to run wild without any effective oversight.
这个项目在缺乏有效监督的情况下开始失控。