[in'seiʃiit]
adj.
不知足的,欲壑难填的

[ adj ]
impossible to satisfy
<adj.all>
an insatiate appetitean insatiable demand for old buildings to restore
his passion for work was unsatiable

Insatiate \In*sa"ti*ate\, a. [L. insatiatus.]
Insatiable; as, insatiate thirst.

The insatiate greediness of his desires. --Shak.

And still insatiate, thirsting still for blood. --Hook.