(especially of a desire or need) too great to be satisfied . (Cambridge)
always wanting more of something (Oxford)
نہ بجھنے والی پیاس
His thirst for public respect was insatiable; for him, honor, more than interest, impelled men's actions.(Cambridge).
The public seems to have an insatiable appetite for celebrity news. (Oxford)
an insatiable appetite
insatiable curiosity
desiring
rapacious
unsatisfied
moderate
filled
insatiable