Hypertext Webster Gateway: "Insoluble"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Insoluble \In*sol"u*ble\, a. [L. insolubilis indissoluble, that
can not be loosed: cf. F. insoluble. See {In-} not, and
{Soluble}, and cf. {Insolvable}.]
1. Not soluble; in capable or difficult of being dissolved,
as by a liquid; as, chalk is insoluble in water.
2. Not to be solved or explained; insolvable; as, an
insoluble doubt, question, or difficulty.
3. Strong. ``An insoluble wall.'' [Obs.] --Holland
From WordNet (r) 1.7 (wn)
insoluble
adj 1: (of a substance) not easily dissolved [ant: {soluble}]
2: admitting of no solution or explanation; "an insoluble
doubt" [ant: {soluble}]
3: without hope of solution; "an insoluble problem"
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