Antonyms of adj soluble

2 senses of soluble

Sense 1
soluble (vs. insoluble) -- ((of a substance) capable of being dissolved in some solvent (usually water))

insoluble (vs. soluble), indissoluble -- ((of a substance) incapable of being dissolved)
        => water-insoluble, non-water-soluble -- (not soluble in water)

Sense 2
soluble (vs. insoluble) -- (susceptible of solution or of being solved or explained; "the puzzle is soluble")

insoluble (vs. soluble) -- (admitting of no solution or explanation; "an insoluble doubt")
        => insolvable, unsoluble, unsolvable, unresolvable -- (not easily solved; "an apparantly insolvable problem"; "public finance...had long presented problems unsolvable or at least unsolved"- C.L.Jones)

Similarity of adj soluble

2 senses of soluble

Sense 1
soluble (vs. insoluble) -- ((of a substance) capable of being dissolved in some solvent (usually water))
       => alcohol-soluble -- (soluble in alcohol)
       => dissolvable, dissoluble -- (capable of dissolving)
       => fat-soluble -- (soluble in fats; "fat-soluble vitamin A")
       => meltable, disintegrable -- (capable of melting)
       => oil-soluble -- (soluble in oil; "oil-soluble pigments")
       => water-soluble -- (soluble in water)

Sense 2
soluble (vs. insoluble) -- (susceptible of solution or of being solved or explained; "the puzzle is soluble")
       => answerable -- (capable of being answered)
       => solvable, resolvable -- (capable of being solved; "such problems are perfectly solvable")
          Also See-> explicable#1