IPA: /nɒnˈvaɪəbl/
KK: /nɑnˈvaɪəbl/
Not able to live, grow, or be successful; not practical or workable.
The project was deemed nonviable due to lack of funding.
Nonviable → It is formed from "non-" (meaning not) and "viable" (from Latin "vita", meaning life). The word "nonviable" means not capable of living or developing, indicating something that cannot sustain life.
Think of 'not' ('non-') being combined with 'life' ('vita') to remember that 'nonviable' refers to something that cannot live or develop.