centr/center:

comes from the Greek kentron and the Latin centrum, meaning "sharp point" or "exact middle of a circle."

1. essentric:

   not following an established or usual style of conduct. (Outside the circle of normal)

2. egocentric:

   overly concerned with oneself. (I'm the center of everything!)

Cornog, M. (1994). Merriam-Webster's vocabulary builder. Springfield, Mass: Merrian-Webster.