A state of matter that is hard and firm and has a shape.
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collapse
(kuh-LAPSS)
To fall down suddenly. This block tower is about to collapse!
Panther Media GmbH/Alamy Stock Photo
insulation
(in-suh-LAY-shun)
A covering to keep heat from getting out. Your body makes heat. A thick coat traps that heat inside to keep you warm on a cold day. The coat is insulation.