Unintelligibility

Name(s): 
Ambiguity
Complexity
Complication
Darkness
Difficulty
Equivocation
Hardness
Inarticulation
Incoherence
Incomprehensibility
Intricacy
Mystification
Obscurity
Opacity
Perplexity
Problem
Shapelessness
Uncertainty
Vagueness
Broader 
Narrower 
Aggravates 
Aggravated by 
Type 
(A) Abstract fundamental problems