Englishfor English speakers
envelope
Noun
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An envelope is a paper cover that you put a letter in to send it.
She put the letter into the envelope, addressed it to Charles, and put a stamp on it.
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An envelope is a covering that goes all the way around something.
Each virus has a special envelope of protein surrounding it.
printer
Noun
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A person who makes prints.
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The person who runs a printing press or the owner of a printing business.
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A machine, usually attached to a computer, used to print words or images onto paper.
I used the printer to make a copy of my project.