adj. not transmitting or reflecting light or radiant energy; impenetrable to sight; "opaque windows of the jail"; "opaque to X-rays"

adj. not clearly understood or expressed

adj. having no intrinsic or objective meaning; not organized in conventional patterns; "an ambiguous situation with no frame of reference"; "ambiguous inkblots"

adj. lacking clarity of meaning; causing confusion or perplexity; "sent confusing signals to Iraq"; "perplexing to someone who knew nothing about it"; "a puzzling statement"

adj. not clearly understood or expressed; "an obscure turn of phrase"; "an impulse to go off and fight certain obscure battles of his own spirit"-Anatole Broyard; "their descriptions of human behavior become vague, dull, and unclear"- P.A.Sorokin; "vague...forms of speech...have so long passed for mysteries of science"- John Locke

adj. lacking definite form or limits; "gropes among cloudy issues toward a feeble conclusion"- H.T.Moore; "nebulous distinction between pride and conceit"

adj. lacking definition or definite content; "nebulous reasons"; "unfixed as were her general notions of what men ought to be"- Jane Austen

adj. in utter disorder; "a disorderly pile of clothes"

adj. having no meaning or direction or purpose; "a meaningless endeavor"; "a meaningless life"; "a verbose but meaningless explanation"

adj. confused and vague; used especially of thinking; "muddleheaded ideas"; "your addled little brain"; "woolly thinking"; "woolly-headed ideas"

adj. not clear to the understanding; "I didn't grasp the meaning of that enigmatic comment until much later"; "prophetic texts so enigmatic that their meaning has been disputed for centuries"

adj. marked by difficulty of style or expression; "much that was dark is now quite clear to me"; "those who do not appreciate Kafka's work say his style is obscure"

adj. skillful at eluding capture; "a cabal of conspirators, each more elusive than the archterrorist"- David Kline

adj. impossible to understand; "impenetrable jargon"

adj. impossible to determine the meaning of; "an indecipherable message"

adj. allowing light to pass through; "clear water"; "clear plastic bags"; "clear glass"; "the air is clear and clean"

adj. allowing light to pass through diffusely; "translucent amber"; "semitransparent curtains at the windows"

adj. transmitting light; able to be seen through with clarity; "the cold crystalline water of melted snow"; "crystal clear skies"; "could see the sand on the bottom of the limpid pool"; "lucid air"; "a pellucid brook"; "transparent crystal"

adj. not elaborate or elaborated; simple; "plain food"; "stuck to the plain facts"; "a plain blue suit"; "a plain rectangular brick building"