erudite \AIR-uh-dyte\ adjective
: possessing or displaying extensive knowledge acquired chiefly from books : learned
The university hosted an informative lecture given by an erudite scholar of Cold War history.
esoteric \es-uh-TAIR-ik\ adjective
*1 : designed for or understood by a small number of people; broadly: difficult to understand
2 : private, confidential
Computer programming was once an esoteric subject, but beginner courses and how-to books have made it easier to grasp.
Pronunciation: \ˌma-kē-ə-ˈve-lē-ən, -ˈvel-yən\
Etymology: Niccolo Machiavelli
1: of or relating to Machiavelli or Machiavellianism
2: suggesting the principles of conduct laid down by Machiavelli ; specifically : marked by cunning, duplicity, or bad faith