IPA: //ˈfiːstər//
KK: /ˈfiːstər/
A person who enjoys a large meal or celebration, often with a lot of food and drink.
At the wedding, many feasters gathered to enjoy the delicious banquet.
Feaster → It is formed from "feast" (from Old French *feste*, meaning a celebration or festival) and "-er" (meaning a person who). A feaster is a person who participates in a feast or celebration, typically involving a large meal.
Think of someone who enjoys a 'celebration' ('feast') — the '-er' just means a person. A feaster is someone who takes part in a festive meal.