Etymologically
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viability

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Pronunciation

  • US: /ˌvaɪəˈbɪlɪti/[1]

Etymology

Etymonline, Merriam-Webster and Klein take it as borrowed from French viabilité, from viable (“capable of living”);[2][3][4] the OED, which revised the entry in 2024, treats it as formed from English viable + -ity after the French word, which is recorded from 1789 in medical use and 1814 in general use.[5] The French adjective, first said in the 16th century of a fetus able to survive outside the womb, is formed from vie (“life”) and -able;[5][2] vie comes from Latin vīta (“life”), from Proto-Indo-European *gwei- (“to live”).[2][6]

Earliest recorded meaning

The capacity of a fetus to survive outside the womb: 1821, in J. G. Smith's Principles of Forensic Medicine.[5] Etymonline dates the word to 1823, in the same sense, especially of a child just born,[2] and the OED of 1989 to 1843.[7]

Semantic evolution

The word followed viable, which was first a term of midwifery (1790) and was then applied to plants and animals able to live in given conditions (1846) and to plans able to be carried out (1879).[5] Viability was soon used of the ability of any living thing to live, exist or grow;[5][3] Etymonline dates its use in natural history, for the ability to live in certain conditions, to 1883.[2] The sense "practicability, feasibility" is recorded from 1860, and it came to be used especially of financial or economic sustainability.[5] Merriam-Webster's examples range from seeds and fetuses to small new states and economic plans.[3]

Timeline

  • 1821 – the capacity of a fetus to survive outside the womb.[5]
  • 1823 – Etymonline's date for the word.[2]
  • 1837 – a rare homonym, of a road: the state of being passable.[5]
  • 1860 – practicability, feasibility; later especially financial sustainability.[5]
  • 1883 – in natural history, the ability to live in particular conditions.[2]

Meanings

Noun

  1. The ability to live, grow and develop, as of a fetus outside the uterus or of seeds under dry conditions.[3][5]
  2. The quality of being workable or feasible, especially of being financially sustainable: Investors doubted the viability of the new factory.[5][3]

Usage notes

The OED also records a rare viability (1837), the state of a road, route or terrain that allows people or vehicles to pass, from French viabilité (1836), based on Late Latin viabilis, from Latin viō (“to travel”);[5] the OED of 1989 dated it 1882.[7]

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  3. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  4. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  5. ^ a b c d e f g h i j k l Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  6. ^ The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
  7. ^ a b Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press