insoluble
[adjective]
Synonyms: inexplicable, baffling, impenetrable, indecipherable, mysterious, unaccountable, unfathomable, unsolvable

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Antonyms: soluble, solvable
Contrasted words: answerable, explicable, understandable, resolvable, clear, plain, straightforward
Related Words: inexplicable, unexplainable, inconceivable, unaccountable, mysterious

[TahlilGaran] English Synonym Dictionary ▲

in‧sol‧u‧ble /ɪnˈsɒljəbəl, ɪnˈsɒljʊbəl $ ɪnˈsɑːl-/ adjective
[Word Family: noun: solution, solvent, solubility, insolvency; adjective: soluble ≠ insoluble, unsolved, solvent ≠ insolvent, solvable ≠ insolvable; verb: solve; adverb: insolvably]

1. an insoluble problem is or seems impossible to solve:
insoluble conflicts within the department

2. an insoluble substance does not become a liquid when you put it into a liquid Antonym : soluble ⇒ dissolve

[TahlilGaran] Dictionary of Contemporary English ▲

insoluble
adj.
I. that cannot be solved/explained
VERBS be, seem | remain
ADV. absolutely | almost | apparently, seemingly

[TahlilGaran] Collocations Dictionary ▲

insoluble
II. impossible to dissolve in a liquid
VERBS be
ADV. highly | practically, virtually
PREP. ~ in These chemicals are practically insoluble in water.

[TahlilGaran] Collocations Dictionary ▲