insatiable
adjectiveUK /ɪnˈseɪʃəbl/
US /ɪnˈseɪʃəbl/
Always wanting more and never feeling full or happy with what you have.
The puppy had an insatiable appetite and kept asking for more treats.
OTHER MEANINGS
2. Impossible to satisfy or fulfill.
Her insatiable curiosity led her to read every book in the library.
3. Never feeling full after eating.
After the long hike, he had an insatiable hunger.
4. Unable to be stopped or lessened.
The team showed an insatiable drive to win the championship.