Inedible

I had failed to refrigerate the milk. It went so sour that it's inedible.

The chicken was oversalted and inedible.

The food was nearly inedible.

The famous white-sand beaches of Hawaii, for example, actually come from the poop of parrotfish. The fish bite and scrape algae off of rocks and dead corals with their parrot-like beaks, grind up the inedible calcium-carbonate reef material (made mostly of coral skeletons) in their guts, and then excrete it as sand.

How can you distinguish an edible mushroom from an inedible one?

How to tell an edible mushroom from an inedible one?

The food is inedible.

The food was cheap, but inedible.

Granny's cookies are inedible.

"Mom, those mushrooms marinated in soy sauce in the fridge look good. Can I eat some of them?" "Sure, you can, but they made my stomach feel weird when I ate them, so be careful." "Huh? Who made them?" "Oh, Grandpa picked out the mushrooms out in the mountains, and then Grandma put them in the soy sauce." "Uh, doesn't that mean that there are inedible mushrooms mixed in there?" "Oh, maybe..."