Englishfor English speakers
in
Preposition
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Used to show that something is inside something else.
The cat is in the box.
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Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
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Used to show movement towards the inside.
The rain came in through the window.
germ
Noun
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A germ is a very small organism that makes other organisms sick, a virus, bacteria, or fungus.
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A germ is a part of an organism that can develop into a new one.