Englishfor English speakers
heating
Noun
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The heating is the system that keeps a house or building warm.
We put new gas heating into the house to make it warmer.
spiral
Noun
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A spiral is a shape that has a curve that curves closer and closer to a point until it stops..
spiral
Verb
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If something spirals, it increases or decreases dramatically.
Her debts were spiraling out of control.