Englishfor English speakers
insulator
Noun
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An insulator is a substance that does not conduct electricity or heat. It can be used to insulate things, such as a room.
material
Noun
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Material is the things or ideas that are used in making or doing something.
The raw materials for the goods are mostly imported from Canada.
After the earthquake, it took a long time to rebuild because the building materials were often unavailable.
He spent a year researching and gathering material before writing the book.
material
Adjective
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Material things are things in the real world, often money.
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If something is material, it is big and important.