To Decay or Become Rotten
This page is the CodyCross answer for the clue below from Trip to Spain, Group 846, Puzzle 2 (Royal Palace).
Question is: To Decay or Become Rotten
and the answer is: DECOMPOSE
Word Meaning:
DECOMPOSE — (transitive) To separate or break down (something) into its components.
Definitions from Wiktionary.