That cannot undergo mixing or blending: immiscible elements. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "immiscible" in a sentence
"There are days when I think that the two entities or disciplines are entirely immiscible and antagonistic, and others where they seem not just to complement each other but to be, in a strange way, twin enterprises."
"I can't help but think about that sitting on top of something holding multiple layers of differently colored immiscible fluids, drawing from it and feeding back into it at the same time."
"The bubbles were too CO2-rich to have formed during cooling and shrinkage of the MI and the authors concluded that the inclusions trapped both silicate melt and an immiscible CO2-bearing vapor."