The Collaborative International Dictionary
Abstrusely
Abstrusely \Ab*struse"ly\, adv. In an abstruse manner.
Wiktionary
abstrusely
adv. In an abstruse manner. (First attested in the early 17th century.)(R:SOED5: page=10)
WordNet
abstrusely
adv. in a manner difficult to understand; "the professor's abstrusely reasoned theories were wasted on his students"
Usage examples of "abstrusely".
Only lately, since I have been able to look things up in books, have I begun to unscramble the anthology of quotations that Matern had cooked up: he mixed liturgical texts, the phenomenology of a stocking-cap, and abstrusely secular lyrical poetry into a stew seasoned with the cheapest gin.