impenetrableness Synonyms

impenetrability opacity obscurity impermeability abstruseness dullness dubiousness dubiety doubtfulness snugness solidness crowdedness clandestineness arcaneness blurriness ambivalence denseness tightness thickness doubt dirtiness cloudiness closeness circumlocution caliginosity bewilderment anonymity ambiguousness ambiguity compactness complexity dimness difficulty deepness darkness covertness confusion concealment complication elitism