legislador
legislator
legislate
to make laws
+
-dor
person who does something (profession suffix)
Legislador means legislator and can be thought of as legislate0 (to make laws0) + -dor1 (person who does something1), so it's a person who makes laws.
noun
- legislatorA person who makes laws as part of a governmentEl legislador propuso una nueva ley sobre el medio ambiente. // The legislator proposed a new law on the environment.