alters is a word that is often used to describe people who have undergone surgery to change their appearance. The surgery can involve anything from changing their hair style to having surgery to change their sex.
When something is blurry, it's difficult to see or understand it. The picture is blurry because the camera was moved too quickly.
When something is indistinguishable, it's impossible to tell which one is which. This can be a problem when you're trying to identify someone.
Physicists are people who study the basic laws of physics. They are also responsible for developing new methods of measuring physical phenomena.
To invent something is to come up with a new idea, to create something new. Inventors often have to think outside the box to come up with new ideas.
To unify something is to make it into a single entity. When you unify two groups, you combine them into one larger group.
There are many possible universes, and each one has its own set of rules and laws. It's impossible to know which universe you are living in, or what the future will be like.
Theorists are people who believe that there is a theory behind everything. They are usually very smart and know a lot about a particular topic.
To be puzzling is to be difficult to understand or to be difficult to understand for a reason. When something is puzzling, it is not easy to understand or figure out.