IPA: /ɪnˈvaɪəbl/
KK: /ɪnˈvaɪəbl/
Not able to live, grow, or develop properly; unable to survive.
The scientist concluded that the cells were inviable and could not be used for the experiment.
Inviable is formed from "in-" (meaning not) and "viable" (from Latin "vita" meaning life). The word describes something that is not capable of living or surviving.
Think of 'not' ('in-') being combined with 'life' ('vita') to remember that 'inviable' means something that cannot live or survive.