viable
adj.
1828, from French viable "capable of life" (1530s), from vie "life" (from Latin vita "life;" see vital) + -able. Originally of newborn infants; generalized sense is first recorded 1848. Related: Viably.
〔李〕[vi;-ablea.] a.可行的； 能养活的； 能生存的 ←vi (L via)=way 路