1. insoluble - Noun
2. insoluble - Adjective
3. insoluble - Adjective Satellite
Not soluble; in capable or difficult of being dissolved, as by a liquid; as, chalk is insoluble in water.
Not to be solved or explained; insolvable; as, an insoluble doubt, question, or difficulty.
Strong.
Source: Webster's dictionaryThe mystery of the beginning of all things is insoluble by us; and I for one must be content to remain an agnostic. Charles Darwin
The almost insoluble task is to let neither the power of others, nor our own powerlessness, stupefy us. Theodor Adorno
The pursuit of science leads only to the insoluble. Benjamin Disraeli
We are continually faced by great opportunities brilliantly disguised as insoluble problems. Lee Iacocca
It is an occupational risk of biologists to claim, towards the end of their careers, that the problems which they have not solved are insoluble. John Maynard Smith
Democracy is finding proximate solutions to insoluble problems. Reinhold Niebuhr