guionista
screenwriter
guion
script
+
-ista
person who does something
Guionista means screenwriter and can be broken down into guion0 (script0) + -ista1 (person who does something1), literally meaning 'a person who writes scripts'.
noun
- screenwriterA person who writes scripts for films, television shows, or other mediaEl guionista ganó un premio por su trabajo. // The screenwriter won an award for his work.