Not viable: applied to a fetus too young to maintain independent life.
The Century Dictionary (Public Domain)
Use "non-viable" in a sentence
""In the banking sector, progress is being made towards recapitalizing, deleveraging, resolving non-viable banks, and strengthening the bank resolution framework.""
""The simultaneous implementation of the interdependent core elements of the program — recapitalizing, deleveraging and resolving the non-viable parts of the banking system — will be require difficult choices," the IMF said."
"The airline recently said it would reconfigure its Airbus planes as it stopped operating its non-viable low-fare brand Kingfisher Red."