sandcastle
nounUK /ˈsændˌkɑːsəl/
US /ˈsændˌkæsəl/
A sandcastle is a small castle you build out of sand at the beach.
The children built a big sandcastle near the water.
OTHER MEANINGS
2. A model or imitation that looks impressive but is fragile and easily destroyed.
Their business plan turned out to be a sandcastle that collapsed in the first storm.
3. A temporary structure or arrangement that is not meant to last.
The peace deal was a sandcastle, washed away by the next dispute.
4. A child's play activity of shaping wet sand into castle-like forms.
Sandcastle building is the highlight of our summer holiday.