This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Of course it will help to know 革命 already as well.
That revolutionary is only hot-tempered on the Internet.
If you want to be a revolutionary, first you need to be able to speak effectively.
She fell in love with a passionate French revolutionary.