Englishfor English speakers
assume
Verb
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If you assume something, you think or believe something without having enough information to know that it's true.
Oh, hello. I assume you're the new student, are you?
If I saw a man dressed all in black, holding a gun, and walking toward me, I would assume that the man is really a dangerous guy and I would run away from him.
I saw your car in the garage, so I assumed you were at home.
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
risk
Noun
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A risk is something bad that could possibly happen.
There are many risks associated with the stock market.
—
A risk is the chance of something bad happening.
The risk of us failing is too great.
risk
Verb
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To risk something means to take a chance with something.
She risked hypothermia by swimming the English Channel.