Adjective
impossible to replace
Source: WordNetIn order to be irreplaceable one must always be different. Coco Chanel
We are living beyond our means. As a people we have developed a life-style that is draining the earth of its priceless and irreplaceable resources without regard for the future of our children and people all around the world. Margaret Mead
Only men of considerable vanity write books; consistently therewith, I worried lest the world were exchanging an irreplaceable author for a more easily purchased diplomat. John Kenneth Galbraith
Old friends die on you, and they're irreplaceable. You become dependent. Lionel Blue
Because, really, what was worse than lying wide-awake in the dark, watching your life drip away, one irreplaceable minute after another? Tom Perrotta
If people destroy something replaceable made by mankind, they are called vandals; if they destroy something irreplaceable made by God, they are called developers. Joseph Wood Krutch