independentista
separatist
independent
independent
+
-ista
person who supports or practices
An independentista is a separatist, which can be thought of as a person who supports or practices1 (-ista1) being independent0.
noun
- separatistA person who supports or advocates for independence or separatismLos independentistas catalanes organizaron una manifestación. // The Catalan separatists organized a demonstration.