abstrusely
adv. C1 Advanced ab·struse·ly
adv. in a way that is very difficult to understand. You use this to describe writing or speech that is so complex it feels like a secret code.
adv. in a manner that is obscure, difficult to understand, or deliberately vague. Often used to describe intellectual or literary styles that avoid clarity.
The professor spoke abstrusely about the new theory.
The legal documents were written abstrusely to confuse the public and hide the company's true intentions.
The philosopher's later works became increasingly abstrusely written, leading many scholars to speculate that his declining health affected his ability to communicate clearly.
From abstruse + -ly.