inviable

Unable to live

Inviable means not capable of surviving or succeeding.

A business plan might be inviable if costs exceed revenue.

An inviable fetus cannot survive outside the womb.

The word appears in technical and formal contexts—economics, medicine, policy analysis: The proposal was deemed inviable given current market conditions.

Viable is far more common than its negative.

unfeasible

impractical

Not suited for use

unworkableImpossible to execute
unrealisticLacking basis in reality
unattainableImpossible to acquire

unsustainable · unachievable · unexecutable · undoable · impracticable · untenable · inoperable · unmanageable · insurmountable · impossible

sterile

barren

Unable to produce

infertileUnable to produce offspring
unfruitfulFailing to produce results
seedlessLacking inner kernels

unfertile · unproductive · fruitless · abortive · lifeless · dead · stillborn

futile

fruitless

Producing no useful outcome

pointlessLacking any purpose
uselessWithout practical value
ineffectiveLacking power to achieve

unavailing · vain · unproductive · purposeless · worthless · abortive · nugatory · bootless · otiose · hollow

Opposites

feasibility/practicality

inviableviable

Capable of succeeding

feasible · workable · practical · sustainable · achievable

biological/reproductive viability

inviableviable

Capable of succeeding

living · alive · healthy · fertile · thriving

Family

survive, vital, vitality, viable, revitalize, vial, viability, nonviable, unviable

Familiarity: Top 1,000,000
Profile: Used worldwide · Timeless · Abstract · Negative · Rated G