insatiable
adj.adj. having a desire or need that is so strong it can never be satisfied. You use this to describe someone who always wants more of something, like food, power, or attention.
adj. impossible to satisfy; having an unquenchable appetite or desire for something. Often used to describe abstract qualities like curiosity, greed, or ambition.
The young child has an insatiable curiosity about nature.
Despite his massive wealth, the businessman had an insatiable appetite for power and continued to buy smaller companies.
The public's insatiable demand for celebrity gossip has fueled the rise of invasive tabloid journalism and the constant presence of paparazzi in major cities.
Inherited from Middle English insaciable, from Middle French insatiable, from Old French insaciable, from Late Latin insatiabilis. by surface analysis, in- + satiable.
Typically precedes the noun it modifies or follows a linking verb like 'be' or 'seem'.