Merge When two companies merge, they become one company. When two or more things merge, they become one. "Merge" is often used as a technical term in business.

Motivate If a thing or a person motivates you to learn English (or do something else), you want to learn English because of that thing or person.

Motivation Your motivation to do something is the reason why you want to do it. If you have motivation, you do something because you want to do it — and not because you have to do it.

Native speaker Native speakers of English are people whose first language is English. They learned English when they were children. They think in English. They use it naturally. Usually native speakers of

Nightmare You are having a nightmare when you sleep in the night and you're having a bad dream (for example, when you are dreaming that someone is trying to kill you). If a situation is very bad, you can also say it is a nightmare.

Conference is a meeting for discussion, usually between a large number of people.

Confuse When you confuse two things, you don't know the difference between them. For example, if you confuse two people — Paul and Frank — you will sometimes think that Paul is Frank or that Frank is Paul.

Cover noun The cover of a book is what you see when the book is closed. Usually, the cover contains the title and the author of the book.

Creature is an animal, a person, or anything which is alive.

Delighted If you are delighted, you are excited and happy.

Dubbed If a film is dubbed, it is a special version where the actors' voices are in another language. Dubbed versions of English-language films are for people who don't understand English.