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“insolvably”
insolvably (adverb), insolvably, most insolvably
Pertaining to how something cannot be explained or figured out: The issue seemed to be insolvably complicated and difficult, so the members of the staff decided to move on to the next item on the agenda.
This entry is located in the following units:
-ably
(page 8)
solv-, -solu-, solut-, -sol, -soluble, -solubility, -solvent
(page 3)