1. the quality of being difficult to understand; obscurity or complexity of meaning
Usage: formal

Examples

• The abstruseness of the philosophical text made it challenging for undergraduate students.
• Critics complained about the abstruseness of the legal document’s language.
• The professor tried to reduce the abstruseness of quantum mechanics through simple analogies.
• The abstruseness of ancient poetry often requires extensive commentary.
• Many readers were put off by the abstruseness of the technical manual.
• The abstruseness of the mathematical proof impressed even seasoned researchers.