a.

1. 暴乱的，聚众闹事的[Z]
2. 狂欢的，狂闹的
   They spent a riotous night drinking and singing.

   他们饮酒唱歌狂欢了一夜。

3. 放纵的，放荡的
4. 奔放的，不受约束的
5. 茂盛的

adj.

1. marked by or involving public disorder.
   ▸involving wild and uncontrolled behaviour.
2. having a vivid, varied appearance.