Use Bacteria or Yeast to Make a Substance Change

This page is the CodyCross answer for the clue below from Greece, Group 666, Puzzle 5 (Archimedes).

Question is: Use Bacteria or Yeast to Make a Substance Change

and the answer is: FERMENT

Word Meaning:

FERMENT — To react, using fermentation; especially to produce alcohol by aging or by allowing yeast to act on sugars; to brew.

Definitions from Wiktionary.

Use bacteria or yeast to make a substance change — CodyCross Answer | CodyCross Solutions