classman
/ˈklæs.mɑːn/Definitions
1. noun
A member of a class, especially in a school or college.
“The classman helped his fellow students with their homework.”
2. noun
In some American universities, a person who has completed their first year and is in their second year, often acting as a mentor or guide to freshmen.
“The classman provided valuable advice to the freshmen on how to navigate campus life.”