Fulminate
/ˈfʊlmɪneɪt/
Definition 1 of 2
Pro Tip 1/3Emotional Intensity
When someone fulminates, they are showing strong emotions like anger or frustration. 
The politician fulminated against the new law with fiery passion.
Pro Tip 2/3Public Speaking
Fulminate is often used to describe someone speaking publicly with forceful criticism. 
The activist fulminated over the injustices at the rally.
Pro Tip 3/3Strong Opposition
To fulminate can also mean to argue vigorously against something. 
He fulminated about the proposed policy during the meeting.