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[in-sol-yuh-buh l] /ɪnˈsɒl yə bəl/
incapable of being dissolved:
insoluble salts.
incapable of being solved or explained:
an insoluble problem.
1350-1400; < Latin insolūbilis; replacing Middle English insolible < Middle French insoluble < L. See in-3, soluble
Related forms
insolubility, insolubleness, noun
insolubly, adverb
semi-insoluble, adjective
Can be confused
insoluble, insolvable, unsolvable. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for in solubly


incapable of being dissolved; incapable of forming a solution, esp in water
incapable of being solved
Derived Forms
insolubility, insolubleness, noun
insolubly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for in solubly
1382, "unable to be loosened," from L. insolubilis "that cannot be loosened," from in- "not" + solubilis (see soluble). Fig, use, of problems, etc., is from 1393.
"It was a tacit conviction of the learned during the Middle Ages that no such thing as an insoluble question existed. There might be matters that presented serious difficulties, but if you could lay them before the right man -- some Arab in Spain, for instance, omniscient by reason of studies into the details of which it was better not to inquire -- he would give you a conclusive answer. The real trouble was only to find your man." [Gertrude Bell, "The Desert and the Sown," 1907]
Online Etymology Dictionary, © 2010 Douglas Harper
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in solubly in Medicine

insoluble in·sol·u·ble (ĭn-sŏl'yə-bəl)
Not soluble.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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in solubly in Science
Not capable of being fully dissolved. Fats and oils are insoluble in water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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