
This letter is pronounced like the English "R," but rolled, as in Spanish. In handwriting, it looks like Рр, but with the bottom of the curve in the lowercase letter not connecting.
Революционер ("revolyutsionеr") is a revolutionary, such as my cousin Kolya, who is fighting for the Bolsheviks, or my great-grandfather Sergei Maximovich, who was a Decemberist.
OK, so I've resisted meta-commentary this far (really difficult for me), but I have to go from Masha to Maya here so I can just say that I don't know how to explain the idea of a revolutionary from an 8-year-old's point-of-view. Also, I must relate how much joy I felt when I made the connection between the 19th-century Russian revolutionary Decemberists and the wonderful indie band the Decembrists. But I'm still waiting for Colin Meloy to write a song about limiting the power of the tsar through revolutionary force and failing. "I fought the tsar and the tsar won..."