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