To be furiously angry is to be very angry. You might be furiously angry when you lose your temper or when you're really upset.
The students were furiously angry when they didn't get their answers the way they wanted them.
He was furiously angry when he found out that his girlfriend was cheating on him.
ADV
(of the elements) in a wild and stormy manner
ADV
in a manner marked by extreme or violent energy
ADV
in an impassioned or very angry manner
1
The captain was shouting furiously.
2
That student is maddening the teacher furiously.
3
The police then attacked the people furiously.
4
The starboard engine was burning furiously.
5
By now the starboard engine was burning furiously.
6
Kevin furiously throws the money in the fireplace.
7
The politicians retort furiously as they were debating.
8
Anglesey furiously repairs the equipment to restore the connection.
9
Bayezid furiously rejected the proposal and marched on Bursa.
10
Jillian furiously accuses her sister of the prank.