
1) Beyond knotty 2) French word used in English 3) Incapable of being dissolved 4) Indissoluble 5) Like chalk in water 6) Like the toughest problems 7) Without hope of solution
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https://www.crosswordclues.com/clue/insoluble

1) Hopeless 2) Incomprehensible 3) Indissoluble 4) Inexplicable 5) Insolvable 6) Irresoluble 7) Unresolvable 8) Unsoluble 9) Unsolvable
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https://www.crosswordclues.com/clue/insoluble

insolubility. Compare with soluble. Refers to a substance that does not dissolve in a solvent to any significant degree. Compounds with solubilities of less than 1 g per liter of water are often referred to as 'insoluble', even though they do dissolve to a small extent.
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http://antoine.frostburg.edu/chem/senese/101/glossary/i.shtml

• (a.) Not to be solved or explained; insolvable; as, an insoluble doubt, question, or difficulty. • (a.) Strong. • (a.) Not soluble; in capable or difficult of being dissolved, as by a liquid; as, chalk is insoluble in water.
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http://thinkexist.com/dictionary/meaning/insoluble/

Not dissolvable in a liquid, such as water or alcohol.
Found on
http://www.ccnphawaii.com/glossary-i.htm

A solid that will not dissolve.
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http://www.encyclo.co.uk/local/20442

Not soluble. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973

(in-sol´u-bәl) not susceptible of being dissolved.
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http://www.encyclo.co.uk/local/21001

Fibers that mostly do not dissolve in water and are not digested by bacteria. Examples of insoluble fibers are cellulose, lignans and some of the hemicelluloses.
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http://www.encyclo.co.uk/local/21801

Not able to be dissolved.
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http://www.encyclo.co.uk/local/22291
In·sol'u·ble adjective [ Latin
insolubilis indissoluble, that can not be loosed: confer French
insoluble . See
In- not, and
Soluble , and confer
Insolvable .]
1. Not soluble; in capable or difficult of being dissolved, as by a liquid; as, chalk is
insol...Found on
http://www.encyclo.co.uk/webster/I/69

Type: Term Pronunciation: in-sol′yū-bĕl Definitions: 1. Not soluble.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=44836

[
adj] - admitting of no solution or explanation 2. [adj] - (of a substance) not easily dissolved 3. [adj] - without hope of solution
Found on
http://www.webdictionary.co.uk/definition.php?query=insoluble
adjective (of a substance) incapable of being dissolved
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https://www.encyclo.co.uk/local/20974
adjective without hope of solution; `an insoluble problem`
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https://www.encyclo.co.uk/local/20974

In chemistry, describing a substance that does not dissolve in water. For example, calcium carbonate is insoluble and forms a suspension in water. It may be separated from water by filtration, passing the suspension through filter paper. Insoluble salts can be made by adding together solutions of two soluble salts. This is called a precipitation re...
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https://www.encyclo.co.uk/local/21221

incapable of being dissolved: insoluble salts. · incapable of being solved or explained: an insoluble problem.
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https://www.infoplease.com/dictionary/insoluble
No exact match found.