When something cannot be read, it is illegible.
Illegible.
incapable of being called back
I only
incapable of being dissolved
Incapable of being foreseen.
not audible; incapable of being heard
The state of being incapable of separation is known as indivisibility. It refers to the quality of being unable to be divided, split, or separated into distinct parts.
smart
"incapable of being wounded, hurt, or destroyed."
Incapable of being morally corrupted.
Being a nerd.
A substance is incombustible if it is incapable of being burned.