Englishfor English speakers
difficult
Adjective
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When something is difficult, it is not easy.
It'll be difficult to get him to change his mind; he's really stubborn.
It's more difficult to learn another language when you're older than when you're young.
The most difficult thing I've ever had to do was get over my fear of flying.
delivery
Noun
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A delivery is the act of moving good or mail from a source to somebody.
The delivery of the letters was delayed by the weather.
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A delivery is the thing that is delivered.
The delivery was damaged when it arrived.
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Your delivery is the way you give a speech.
I liked what you had to say, but you really need to improve your delivery.