IPA: /ɪnˈroʊlər/
KK: /ɪnˈroʊlər/
A person who signs up or registers for something, such as a course or program.
The enroller helped students complete their applications for the new semester.
Enroller → It is formed from "en-" (meaning to cause to be in) and "roll" (from Old French *roler*, meaning to roll or list). The word "enroller" means to cause someone to be listed or registered, as in enrolling in a course or program.
Think of 'en-' meaning to cause to be in and 'roll' as in listing someone — that's how enroller means someone who puts you on a list.