esoteric
US /ˌes.əˈter.ɪk/
UK /ˌes.əˈter.ɪk/

1.
esotérico, obscuro, para poucos
intended for or likely to be understood by only a small number of people with a specialized knowledge or interest.
:
•
The book was full of esoteric references that only a few scholars could understand.
O livro estava cheio de referências esotéricas que apenas alguns estudiosos conseguiam entender.
•
His lectures often contained esoteric jokes that went over most people's heads.
Suas palestras frequentemente continham piadas esotéricas que a maioria das pessoas não entendia.