There are two meaning for insoluble; something that can't be dissolved and a mystery or a puzzle that can't be solved:
Sand is insoluble in water and builds up on the edge of the ocean as a beach.
The disappearance of the woman was insoluble for twenty two years, when her remains were found in the desert.
Insoluble, I think is the word.
Define the word answer?
The word you are looking for is "insoluble." This term is used to describe substances that do not dissolve in a particular solvent, such as water.
Define the word geography
insoluble
Insoluble (the property of insolubility).
define the word attraction?
the meaning of a word
The problem isn't insoluble; I'm sure we can find a solution eventually. These markers are insoluble; be careful not to get them on your clothes.
I will define this word so that you will know what the word means.
It explains the meaning of something. To define: To describe or outline the functional characteristics of a word or object.
insoluble