Englishfor English speakers
normal
Adjective
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A normal thing, or situation, is one that is not special.
A normal computer has a keyboard, and a screen.
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When someone is back to normal, he is healthier and no longer sick.
I am glad he is back to normal after one week of the flu.
complex
Adjective
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If something is complex, it has lots of parts or pieces, or is difficult to understand.
He has constructed a complex computer system to send translated messages between humans and dolphins.
A complex problem that we face today is poverty, especially in Africa.
complex
Noun
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A problem.
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A group of buildings with a common purpose, such as a university or military base.
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A psychologically based dislike or fear of a particular thing.
Jim has a complex about working for a woman boss.
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A thunderstorm that forms when two storm fronts collide.
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A structure with a central atom or molecule that has a weak connection to atoms or molecules around it.