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/ˈsæn(d)ˌkæsəl/ · noun
A sculpture made of sand and resembling a miniature castle; typically, but not always, made for fun by a child on a beach..
Children learn the importance of water in soil mechanics from an early age. They learn on the beach while making sandcastles. When they use dry sand, their castle flows into a heap even as they lift the bucket. The particles of sand have no cohesion and little friction between them.
Use sand castle when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Sand castle means A sculpture made of sand and resembling a miniature castle; typically, but not always, made for fun by a child on a beach..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Children learn the importance of water in soil mechanics from an early age. They learn on the beach while making sandcastles. When they use dry sand, their castle flows into a heap even as they lift the bucket. The particles of sand have no cohesion and little friction between them.
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