Puzzle With No Solution Just Won't Dissolve?
This page is the CodyCross answer for the clue below from Top Secret, Group 2089, Puzzle 1 (Special Assignment).
Question is: Puzzle With No Solution Just Won't Dissolve?
and the answer is: INSOLUBLE
Word Meaning:
INSOLUBLE — (physical chemistry) That cannot be dissolved.
Definitions from Wiktionary.