pour/throw cold water on

US /pɔr/θroʊ koʊld ˈwɔtər ɑn/
UK /pɔr/θroʊ koʊld ˈwɔtər ɑn/
"pour/throw cold water on" picture
1.

冷水を浴びせる, やる気をなくさせる

to say or do something that discourages someone or makes them feel less enthusiastic about something

:
She was excited about her new business idea, but her parents poured cold water on it.
彼女は新しいビジネスアイデアに興奮していたが、両親はそれに冷水を浴びせた
Don't throw cold water on his plans; he's really trying hard.
彼の計画に冷水を浴びせないでください。彼は本当に一生懸命やっています。