insolubleadjective
uk/ɪnˈsɒl.jə.bəl/us/ɪnˈsɑːl.jə.bəl/insoluble adjective (PROBLEM)
US also insolvable (of a problem) so difficult that it is impossible to solve:
Traffic congestion in large cities seems to be an insoluble problem.
Thesaurus: synonyms and related words
Complicated and difficult to do
- advanced
- ambitious
- another
- arduous
- as much as you can do idiom
- fiddly
- fiendish
- fierce
- formidable
- get blood out of/from a stone idiom
- painstaking
- picnic
- problematic
- punishing
- rigorous
- unwieldy
- uphill
- vexed
- wearing
- wearying
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insoluble adjective (SUBSTANCE)
(of a substance) impossible to dissolve:
These minerals are all insoluble in water.
Thesaurus: synonyms and related words
Chemistry: types of chemical
- acid salt
- alkali
- alkali metal
- alkyl
- alkyne
- anhydrous
- buffer
- hydrate
- hydro-
- hydrocarbon
- oxide
- petrochemical
- polymer
- stain
- stearic acid
- strong acid
- strong base
- universal indicator
- weak acid
- weak base
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insolubility
noun [ U ] uk/ɪnˌsɒl.jəˈbɪl.ə.ti/us/ɪnˌsɑːl.jəˈbɪl.ə.t̬i/