ferment
verbUK /fəˈment/
US /fərˈment/
When tiny living things change food or drink and make it taste different or get bubbly.
The grape juice will ferment and turn into wine.
OTHER MEANINGS
2. To be excited or upset about something for a long time.
The bad news fermented in his mind all week.
3. A state of noisy excitement or trouble among people.
The whole town was in a ferment after the big game.
4. To cause food to change by adding yeast or bacteria.
They ferment cabbage to make sauerkraut.