In this Adventure in Etymology we fish for the origins of the word fish.

Fish [fɪʃ] can refer to:

• A typically cold-blooded vertebrate animal that lives in water, moving with the help of fins and breathing with gills.


• Any animal (or any vertebrate) that lives exclusively in water.


• As a verb it can mean: To hunt fish or other aquatic animals in a body of water, or to collect coral or pearls from the bottom of the sea.

Other meanings are available, and some would say there’s no such thing as a fish.

It comes from Middle English fisch [fiʃ] (fish, and other animals that live in water), from Old English fisċ / fix / ᚠᛁᛋᚳ [fiʃ / fisk] (fish), from Proto-West Germanic *fisk, from Proto-Germanic *fiskaz [ˈɸis.kɑz] (fish), from Proto-Indo-European *peysk- (fish) [source].

Words from the same PIE root include vis (fish) in Dutch, fisk (fish, Pisces) in Swedish, peixe (fish) in Portuguese, pez (fish, idiot) in Spanish, pêcher (to fish) in French, pysgodyn (fish) in Welsh, iasc (fish) in Irish, and piscine (fishy, pertaining to fish) and piscatorial (pertaining to fish, fishing or fishermen) in English [source].

The Proto-Indo-European *peysk- (fish) only has descendents in the Germanic, Romance and Celtic languages. Another PIE root for fish is *dʰǵʰúHs, which became ձուկ (juk – fish, calf muscle) in Armenian, zivs (fish) in Latvian, žuvis (fish) in Lithuanian, and ιχθύς (ichthýs – fish) in Greek – (archaic) appears mainly in compounds such as χθυοπώλης (ichthyopólis – fishmonger) [source].

Some fish-related words in English also come from the same roots, via Ancient Greek ἰχθύς [ixˈθis] (ikhthús, fish, stupid person). These include: ichthyology (fish science), ichthyosaur (any fishlike marine reptiles of the extinct order Ichthyosauria), ichthyolatry (the worship of fish or fish-shaped idols), and ichthyophobia (fear of fish) [source].

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I also write about words, etymology and other language-related topics on the Omniglot Blog, and I explore etymological connections between Celtic languages on the Celtiadur blog.