mid-14c., "troublesome, wanton, extravagant," from Old French riotos "argumentative, quarrelsome," from riote (see riot (n.)). Meaning "tumultuous, turbulent" is mid-15c. Related: Riotously; riotousness.
实用例句
1. The dinner was often a riotous affair enlivened by superbly witty speeches.
宴会常常会因为一些非常诙谐的讲话而气氛活跃，热闹非凡。
来自柯林斯例句
2. The organizers of the march were charged with assault and riotous assembly .
游行组织者被控侵犯人身及暴乱性非法集会。
来自《权威词典》
3. He has been sent down for riotous behaviour.
他因为行为放纵而被开除了.
来自《简明英汉词典》
4. He was expelled from college for riotous conduct.
他因行为放荡而被勒令退学.
来自《现代英汉综合大词典》
5. He found congenial officers who knew how to leaven war's rigours with riotous enjoyment.