An intrinsic characteristic of something is the basic and essential feature that makes it what it is.
If someone is introspective, they spend a lot of time examining their own feelings, thoughts, or ideas.
An introvert is someone who primarily prefers being by themselves instead of hanging out with others socially; nevertheless, they still enjoy spending time with friends.
When you introduce someone, you present them to another person who previously did not know who they were.
The entrance to a building is where you go into the building.
Differentiated vocabulary for your students is just a click away.