Antonyms of adj opaque

2 senses of opaque

Sense 1
opaque (vs. clear) -- (not transmitting or reflecting light or radiant energy; impenetrable to sight; "opaque windows of the jail"; "opaque to X-rays")

clear (vs. opaque) -- (allowing light to pass through; "clear water"; "clear plastic bags"; "clear glass"; "the air is clear and clean")
        => crystalline, crystal clear, limpid, lucid, pellucid, transparent -- (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")
        => hyaline, hyaloid -- (resembling glass in transparency or translucency; "the morning is as clear as diamond or as hyaline"-Sacheverell Sitwell)
        => liquid, limpid -- (clear and bright; "the liquid air of a spring morning"; "eyes shining with a liquid luster"; "limpid blue eyes")
        => translucent, semitransparent -- (allowing light to pass through diffusely; "translucent amber"; "semitransparent curtains at the windows")
        => unclouded -- (not made opaque or cloudy by sediment; "the wine was unclouded")
        => unfrosted -- ((of glass) lacking a frosted coating; "unfrosted light bulbs")

Sense 2
opaque, unintelligible -- (not clearly understood or expressed)

INDIRECT (VIA incomprehensible) -> comprehensible, comprehendible -- (capable of being comprehended or understood; "an idea comprehensible to the average mind")

Similarity of adj opaque

2 senses of opaque

Sense 1
opaque (vs. clear) -- (not transmitting or reflecting light or radiant energy; impenetrable to sight; "opaque windows of the jail"; "opaque to X-rays")
       => cloudy, muddy, mirky, murky, turbid -- ((of liquids) clouded as with sediment; "a cloudy liquid"; "muddy coffee"; "murky waters")
       => fogged, foggy -- (obscured by fog; "he could barely see through the fogged window")
       => frosted -- ((of glass) having a roughened coating resembling frost; "frosted glass")
       => glaucous -- (having a frosted look from a powdery coating, as on plants; "glaucous stems"; "glaucous plums"; "glaucous grapes")
       => lightproof, light-tight -- (not penetrable by light; "lightproof containers")
       => milky, milklike, whitish -- (resembling milk in color not clear; "milky glass")
       => semiopaque -- (partially opaque)
       => solid -- (impenetrable for the eye; "solid blackness")
          Also See-> unclear#2

Sense 2
opaque, unintelligible -- (not clearly understood or expressed)
       => incomprehensible (vs. comprehensible), uncomprehensible -- (difficult to understand; "the most incomprehensible thing about the universe is that it is comprehensible"- A. Einstein)