əb skyuh rən tih zəm [or] ab skyə raen tih zəm
1: active opposition to intellectual enlightenment, especially by withholding knowledge from the public.
The New York Times published an editorial condemning the Republican Party’s obscurantism on climate change.
2: a deliberate lack of clarity or directness of expression, as in certain styles of art or literature.
Many regard academic jargon as a form of obscurantism intended to maintain the exclusivity of the professorial class.