insatiable

An extremely strong desire for food that cannot be satisfied.

A very strong desire to know or learn something.

An extremely strong wish for something that is difficult to satisfy.

A constant and seemingly unlimited need for a resource or product.

Often used metaphorically for a strong craving, not just for food.

An uncontrollable or immoral desire, especially for power or sexual gratification.

Often used metaphorically for a strong desire for something, like knowledge.