Which word refers to making something so confused that it is difficult to understand?

The word "obfuscate" specifically refers to the act of making something obscure, unclear, or confusing. When information is obfuscated, it becomes challenging to grasp or comprehend due to its complexity or vagueness. This term is commonly used in contexts where clarity is needed, such as legal documents or technical explanations—where the intention might be to make something difficult to understand, either unintentionally or through deliberate actions.

The other terms, while they have their own meanings, do not convey this specific sense of confusion. "Malleable" describes the ability of a substance to be shaped or formable, usually in a physical sense. "Mitigate" means to make less severe or serious, often used in the context of reducing negative impacts. "Nadir" refers to the lowest point in a situation, whether literally or metaphorically, unrelated to confusion or clarity of understanding. Thus, "obfuscate" most accurately captures the intended meaning of making something hard to understand.