Definition of nonviable
: not viable : not capable of living, growing, developing, or functioning successfully
nonviable cells a nonviable solution … states that adopted the insurance reforms into law might find their markets nonviable without the federal subsidies and mandates.— Timothy Jost
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Merriam-Webster unabridged
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Time Traveler for nonviable
The first known use of nonviable was in 1871
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