The word "indulge" means to allow oneself to enjoy something, often to excess or without restraint. It suggests giving in to one's desires or appetites, whether they are related to food, activities, or other pleasures. For example, if you indulge in chocolate cake, it means you enjoy eating it, possibly more than is healthy or necessary.
The word "indulge" comes from the Latin word "indulgere", which means to be kind or lenient. The prefix "in-" means "in" or "upon", and "dulgere" derives from "dulcis", meaning "sweet". Over time, it evolved into the Old French "indulger" before becoming the English "indulge".