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to cool down; to get cold
to cool off (excitement, temper, etc.); to subside; to dampen; to fade; to wane
to be cold (eyes, expression, etc.); to be composed
置いておいたらコーヒーが冷めてしまった。
The coffee got cold after being left out.
二人の関係への興味が冷めてしまった。
Interest in their relationship has cooled completely.
時間が経って彼女への気持ちが冷めた。
Over time, my feelings for her cooled down.