inappeasable

In his former journey he acquired an inappeasable relish for his dreadful food.

Mr Merdle didn't want him, and was put out of countenance when the great creature looked at him; but inappeasable Society would have him--and had got him.

My earliest efforts in fiction were monstrous exploits which I attributed to him: in fact I made him a character in an endless tale of impossible adventures which I used to tell to a boy named Bellhouse, who had an inappeasable appetite for Dowling stories.