noun
cold water; cold drinking water
Refers to cold water, often for drinking. Can also appear in set phrases like 冷や水を浴びせる (to throw cold water on, to discourage).
夏は冷や水がおいしい。
Cold water tastes good in summer.
彼の提案に冷や水を浴びせるようなことを言った。
He said something that threw cold water on the proposal.