DictionaryfermentBiochemical breakdown
verb / noun

ferment

fer-MENT/fərˈment/

To break down organic material through microorganisms.

Tiny bubbles rise through the brine as cabbage ferments in the jar.

A home cook observes cabbage fermenting in a clear glass jar on a kitchen counter, chopped cabbage fully submerged in pale brine beneath a glass weight, a few tiny bubbles visibly rising through liquid.
Etymology

Fermentare described leavening or causing something to rise. That older focus on fermentation’s visible effect connects with the modern sense of undergoing or causing microbial chemical breakdown.

In context

Mind Pump Show52:04
food sits there for longer it begins to ferment that causes bloating and gas nobody feels good from that
How to IMPROVE YOUR HEALTH With These SIMPLE At Home Tests | Dr. Stephen Cabral on Mind Pump 1910

More examples

  • Yeast ferments the sugars in grape juice.
  • They fermented the milk to make yogurt.
  • Yeast serves as a ferment in bread dough.

Forms

ferment · ferments · fermented · fermenting

fermentation noun — The breakdown of organic material by microorganisms.

Similar words

decompose
Covers organic breakdown generally, not just fermentation by microorganisms.
rot
Usually implies unwanted decay rather than controlled biochemical change.