Definition
To discourage or express negativity towards someone's ideas or plans; to dampen enthusiasm for something.
泼冷水
He always throws cold water on my ideas whenever I propose a new project.
每当我提出一个新项目时，他总是对我的想法泼冷水。
She threw cold water on our camping plans, saying the weather forecast was bad.
她对我们的露营计划泼冷水，说天气预报不好。
Don't throw cold water on his dreams; you should encourage him.
不要对他的梦想泼冷水，你应该鼓励他。