{i} resistance to progress (political and/or social) and the spread of knowledge; deliberate creation of obscurity
a deliberate act intended to make something obscure a policy of opposition to enlightenment or the spread of knowledge
Obscurantism is the practice or policy of deliberately making something vague and difficult to understand, especially in order to prevent people from finding out the truth. legalistic obscurantism. the practice of deliberately stopping ideas and facts from being known