Can you solve the counterfeit coin riddle? - Jennifer Lu

Important Vocabulary Words From The Video


When someone is angrier, they are more angry than usual. They might be angry at the world, or they might be angry at a specific person.

  • He was angrier than usual after his argument with his girlfriend.
  • She was angrier than usual after her argument with her boss.

A trusty is a person or animal that you can trust. You can trust them to do what you ask them to do, and you know that they will always be there for you.

  • The dog is my trusty, and I always know that he will protect me.
  • The plant is my trusty, and I know that he will always protect me from the bad things that happen in the world.

When something narrows down, it becomes more specific or focused. The definition of the word is derived from the Old English word for a small stream.

  • The definition of the word narrowed down to just cars.
  • The definition of the word narrowed down to just the types of cars that were allowed.

unmarked means not marked. When you see an unmarked road, you don't know which way to go.

  • The unmarked path led down into the valley.
  • The unmarked grave was a surprise to the family.

An impostor is someone who pretend to be someone else in order to deceive others. They might pretend to be someone famous or important in order to get their hands on valuable information.

  • The police are looking for an impostor who is pretending to be a detective.
  • The impostor was wearing a fake beard and glasses to look like the real doctor.

To reassemble something is to put it back together again. When you break something, you might need to reassemble it so that it works properly again.

  • The team reassembled the toy quickly so that the child would not be sad.
  • He reassembled the toy so that the pieces would fit back together properly.

approvingly means with approval. If you say that someone is approvingly wearing a dress, you mean that they are wearing the dress in a way that is likely to make people think well of them.

  • She approvingly looked at the new dress that she bought.
  • He approvingly smiled at the new dress that she bought.

To nod is to respond with a simple "yes" or "no" when someone is asking you a question. Sometimes people nod when they don't understand a word that someone is saying.

  • He nodded when I asked him if he wanted to come to the party with me.
  • She nodded when I asked her if she wanted to go to the party with me.

To counterfeit something is to make a copy of it that is not authentic. It's often done to make money, to deceive people, or to damage the reputation of someone else.

  • The company is counterfeiting the product, which is why it's so dangerous.
  • The politician is counterfeiting the votes, which is why he's winning the election.