save something for a rainy daySAVE something TO USE LATERto save something, especially money, for a time when you will need it 留着某物以备不时之需〔尤指钱〕;未雨绸缪save something for a rainy day• Put it in a box in your guitar case and save it for a rainy day.
→ save something for a rainy day at rainy(1)