insatiable
in-SAY-shuh-buladjMeaning impossible to satisfy; always wanting more
Memory hook never SATIsfied: in-SATI-able. Ivy has eaten a whole stack of pancakes and still is not satisfied: “More!” Her appetite is insatiable.
The puppy had an insatiable appetite for tennis balls.
In context Lila’s curiosity was insatiable; after reading every book about volcanoes in the school library, she asked the librarian to order more.
Similar unquenchable, voracious, unappeasable
Opposite satisfied, content
From Latin insatiabilis: in- (not) + satiare (to fill, satisfy), from satis (enough).