To teleport is to suddenly move from one place to another without actually moving. You might teleport from your home to your office, or from one room to another in your house.
Untenable means that something is not possible or not likely to happen. The situation is untenable because it's not possible for the government to pay its debts
To cycle is to repeat a pattern or sequence. When you cycle a wheel, you are turning it in a circle.
An invader is someone who comes into a country or territory without permission. They are usually invaders who are trying to take over the country or territory.
Neuron is a type of cells in the brain that are responsible for processing information. They are also responsible for sending signals to other cells.
To backtrack is to go back the way that you came. When you backtrack, you are retracing your steps.
To conquer something is to win or defeat it. When the Spanish conquistadors conquered Mexico, they were able to take over the country and control it.
An absolute is a statement that is considered to be true in all cases. For example, an absolute statement might say that there is no such thing as a perfect person.