fentanyl

Etymology

It is apparently formed from English phen- + anilide + -yl, with “fen-” standing for “phen-”, a “-t-” that may be arbitrary, and “an-” taken from “anilide”, the parts naming components of the molecule.^[2][3] Etymonline likewise calls it a blend of the same elements with arbitrary changes of spelling.^[4] Other dictionaries analyse it differently: Merriam-Webster as probably an alteration of phenethyl,^[5][6][7] the American Heritage Dictionary as altered from phenyl and ethyl with an altered aniline,^[8] and Dictionary.com as a contraction and respelling of the chemical name.^[9] The substance was first synthesized in 1960 by the Belgian physician Paul Janssen.^[4]

Earliest recorded meaning

A synthetic opiate used as a powerful painkiller, especially in anaesthesia: 1963, in a paper by P. A. J. Janssen and others in Arzneimittelforschung.^[2] Etymonline dates the word to 1963,^[4] Merriam-Webster to 1964,^[5][6] and Dictionary.com to 1960–65.^[9]

Timeline

• 1963 – a synthetic opioid analgesic.^[2][4]

Meanings

Noun

1. A powerful synthetic opioid analgesic that acts like morphine, used in anaesthesia and for severe or chronic pain, given by injection, by mouth or through a skin patch.^{[5][8][10][2]}

Related words

• phenyl
• ethyl
• aniline
• anilide

Usage notes

Wiktionary notes a widespread but nonstandard American pronunciation as if the word were spelled fentanol, by confusion with the suffix -ol used in the names of alcohols.^[1]

References

1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
4. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
5. ^ a b c Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
6. ^ a b Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
7. ^ Gove, Philip Babcock, ed. (1961), Webster's Third New International Dictionary of the English Language, Unabridged, Springfield, Mass.: G. & C. Merriam
8. ^ a b The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
9. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
10. ^ Collins English Dictionary (2023), Glasgow: HarperCollins