: incapable of surviving especially because of a deleterious genetic constitution.

Is there a word inviable?

in·vi·a·ble

adj. Unable to survive or develop normally: an inviable newborn calf. in·vi·a·bil′i·ty n.

Which is correct unviable or inviable?

As adjectives the difference between unviable and inviable

is that unviable is while inviable is unable to sustain its own life.