trailero
trucker
trailer
trailer
+
-ero
person who works with
Trailero means trucker and can be broken down into trailer0 + -ero1 (person who works with1), literally meaning 'a person who works with trailers'.
noun
- truckerA truck driver, especially one who drives long-distance trailersMi tío trabaja como trailero y viaja por todo el país. // My uncle works as a trucker and travels across the country.