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Additional vocab three
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To fall down; cave in
collapse
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Serious damage or ruin
destruction
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Dangerous or serious
Severe
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A dangerous or difficult situation for a period of time.
crisis
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Large or considerable in amount.
substantial
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To make different; to change.
Alter
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Something that can cause danger or harm.
hazard
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Not behaving in a way that is expected
Unpredictable
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