IPA: /hɒˈstɛlə/
KK: /hɑːˈstɛlər/
A person who stays in a hostel, which is a type of budget accommodation, often shared with other travelers.
During my trip, I met a friendly hosteller who shared travel tips with me.
Hosteller is derived from "hostel" (from Old French *hostel*, meaning a place of lodging) and "-er" (meaning a person who). The word refers to a person who stays in or manages a hostel.
Think of a 'hostel' as a place for lodging, and the '-er' indicates a person associated with it — so a hosteller is someone who stays in or manages a hostel.