Etymologically

hydrophobia

Etymology and origin of the Latin word hydrophobia

Confidence
Established
Formation
Borrowing
First attested
Caelius Aurelianus
Borrowed from
Ancient Greek ὑδροφοβία
Ultimate origin
Ancient Greek (ὕδωρ,φόβος)
Etymology tree
inherited borrowed derived
Latin hydrophobia
English hydrophobia

Pronunciation

  • IPA (Classical): [hy.drɔˈpʰɔ.bi.a][1]
  • IPA (Ecclesiastical): [i.droˈfɔː.bi.a][1]

Forms

hydrophobia f (genitive hydrophobiae); first declension[1]

Etymology

It is borrowed from Ancient Greek ὑδροφοβία (hudrophobía, “dread of water”),[1][2][3] from ὑδροφόβος (hudrophóbos, “dreading water”), from ὕδωρ (húdōr, “water”) and φόβος (phóbos, “fear”).[4]

Earliest recorded meaning

Caelius Aurelianus discusses it in his work on acute diseases.[2][5] Köbler dates him to the 5th century AD.[3]

Semantic evolution

It was dread of water, the hydrophobia that marks rabies.[2][6] Celsus still writes the word in Greek, and Ovid describes it in Latin as formīdātae aquae, “water that is dreaded”.[2][5]

In medieval Latin it was a morbid fear of water and rabies itself.[7][6] An Old English gloss renders it as “water-fear”.[7] English hydrophobia is recorded in the late 14th century.[4]

Timeline

  • 14–37 AD – Celsus writes the word as Greek.[2][3]
  • 5th century AD – Caelius Aurelianus uses it.[2][3]
  • late 14th century – English hydrophobia is recorded.[4]

Meanings

Noun

  1. (medicine) Dread of water, hydrophobia; rabies.[2][7]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  3. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ a b Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  6. ^ a b Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
  7. ^ a b c Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press

Borrowed into

Related etymologies

Cite this entry

“Hydrophobia.” Etymologically, 15 Oct. 2026, etymologically.com/la/hydrophobia. Accessed 16 Oct. 2026.

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