You searched for: “viable
1. Capable of life; for example, a viable premature baby is one who is able to survive outside the womb.
2. Able to maintain an independent existence or able to live after birth.
3. Capable of success, or continuing effectiveness; practicable; such as, a viable plan or a viable national economy.

Viable was originally restricted to the senses of "able to grow" and "able to survive"; as, in a viable fetus.

Its extended sense of "able to be done" or "worth doing"; as, in "viable alternatives", is now well established and acceptable in the English language.

This entry is located in the following units: -able (page 42) viva-, vivi-, vivo-, viv- (page 4)
(Greek > Latin: to bring forth, to bear; producing viable offspring; giving birth to; brood; secreting)