All viable antonyms
vi·a·ble
V v adj viable
- infeasible — not feasible; impracticable.
- inoperable — not operable or practicable.
adjective viable
- impracticable — not practicable; incapable of being put into practice with the available means: an impracticable plan.
- nonfunctional — Not having any particular purpose or function.
- nonviable — not capable of living, growing, and developing, as an embryo, seed, or plant.