viably - adj.
1 (of a plan etc.) feasible; practicable esp. from an economic standpoint.
2 a (of a plant, animal, etc.) capable of living or existing in a particular climate etc. b (of a foetus or newborn child) capable of maintaining life.
3 (of a seed or spore) able to germinate.

viability n. viably adv. [F f. vie life f. L vita]