rajahöyry
Rajahöyry is a Finnish term that translates to "royal steam" or "king's steam." It does not refer to a specific historical event, technological innovation, or a recognized cultural phenomenon. The term appears to be a literal combination of "rajah" (king or ruler) and "höyry" (steam).
In its most direct interpretation, "rajahöyry" could be used metaphorically to describe a powerful or majestic
It is possible that "rajahöyry" is a neologism, a word coined for a specific, possibly fictional, context