ferment
US /fɚˈment/
UK /fɚˈment/

1.
2.
schüren, anfachen
to stir up or incite (trouble or disorder)
:
•
His words seemed to ferment discontent among the workers.
Seine Worte schienen Unzufriedenheit unter den Arbeitern zu schüren.
•
The political unrest began to ferment in the capital.
Die politischen Unruhen begannen in der Hauptstadt zu brodeln.