Englishfor English speakers
area
Noun
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An area is a piece of land or space.
This is the business area of town.
We have chosen a large forest area for the new park.
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An area of study is a special subject, such as mathematics, grammar, music, or biology.
Economics is quite interesting, but my area is more related to politics.
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The area of a surface, is the size of the surface.
The length is 10 cm and the width is 5 cm, so the area is 50 mathcm^2/math.
without
Preposition
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Used to say that you don't have something or that something isn't in a place.
I went all the way to school without my books.
It's hard to make a word without a, e, i, o, or u.
The picture's OK, but the room looks better without it.
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Used to say that somebody didn't do something or that something didn't happen.
She walked past without looking at me.
Without stopping, he ran all the way home.
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outside
internal
Adjective
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within or inside
Doctors had to operate to stop the internal bleeding.
Grammar is mostly concerned with the internal structure of words and sentences.
The company has been weakened by ongoing internal conflict.
The police are conducting an internal investigation after officers shot two people.
They've painted the internal walls but left the outside as it was.
frontier
Noun
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The frontier is part of a country that is next to another country.
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A frontier is an area where few or no people live.
Many settlers were killed on the frontier during colonial days in America.
Outer space is said to be the last frontier.