Answer: opaque

AnswerCrossword Clue
OPAQUELight-rejecting
OPAQUEDull
OPAQUEDense
OPAQUELacking clearness
OPAQUEUnclear
OPAQUENot easily understood
OPAQUEImpossible to see through
OPAQUEClear as mud, so to speak
OPAQUEHard to see through
OPAQUEObscure.
OPAQUEObscure or dark
OPAQUENot allowing light to pass through
OPAQUEHardly transparent
OPAQUELike some lampshades
opaquenot allowing light to pass through
opaquedark; dull
opaquenot clear
opaqueto make opaque / impervious to light
OPAQUELight-blocking
OPAQUEImpenetrable, in a way
OPAQUEUnfathomable
OPAQUEHard to grasp
OPAQUEMuddy
OPAQUEMurky
OPAQUEHard to understand
OPAQUEOpposite of transparent
OPAQUENot transparent or translucent
OPAQUENot clear
OPAQUEThickheaded
OPAQUENot transparent
OPAQUENot at all clear
OPAQUEDark.
OPAQUENot reflecting light.
OPAQUENot transparent.
OPAQUEDull or dark.
OPAQUENot clear.