Adjektive
vague [ vaguer ; vaguest ]
enigmatic [ more enigmatic ; most enigmatic ]
unclear [ unclearer/more unclear ; unclearest/most unclear ]
opaque [ more opaque ; most opaque]
shady [ shadier ; shadiest ]
obscure [ more obscure ; most obscure]
dark [ darker ; darkest ]
doubtful [ more doubtful ; most doubtful ]
shadowy [ shadowier/more shadowy ; shadowiest/most shadowy ]
indeterminate [ more indeterminate ; most indeterminate] , {math.}
recondite [ more recondite ; most recondite ]
...
