Wiktionary
undecayed
a. Not having decayed.
Usage examples of "undecayed".
The flesh of these persons was entire and undecayed, of a brown dryish colour, produced by time, the flesh having adhered closely to the bones and sinews.
But before the observer opens the box and observes the cat’s fate—and, by extension, the state of the radioactive atom—they are in superpositions, that is the state of being both dead and alive, or decayed and undecayed, simultaneously.