abstrusity Synonyms

abstruseness profundity profoundness reconditeness equivocation impenetrability equivocalness obliquity obscurity enigma embarrassment murkiness brain-teaser cliffhanger difficult proposition braintwister brain-twister awkward problem nebulousness cruncher crossword Chinese puzzle chiller brainteaser doubt distraction complexity charade chaos challenge case bewilderment argument anagram ambiguousness ambiguity complication concern dilemma difficulty depth darkness cryptogram crux convolution conundrum contention confusion affair