Where does “sweetfish” come from?

sweetfish (English) comes from English Fish, from Old English fiscian, from Proto-West Germanic fiskōn, from Proto-Germanic fiskōną, from Proto-Germanic -ōną, from Proto-Indo-European -eh₂yéti, from Proto-Indo-European -yéti, from Proto-Indo-European yé- — he, she.

sweetfish (English): An amphidromous fish, the ayu of East Asia (Plecoglossus altivelis), the only member of its genus and family Plecoglossidae, named and prized for its sweet-tasting flesh, especially in Japan, as a game fish, and is also subject to extensive aquaculture

Definitions

  1. An amphidromous fish, the ayu of East Asia (Plecoglossus altivelis), the only member of its genus and family Plecoglossidae, named and prized for its sweet-tasting flesh, especially in Japan, as a game fish, and is also subject to extensive aquaculture

Ancestry of “sweetfish”, step by step

sweetfish traces back through two separate lines of ancestry.

via English Fish

StepLanguageWordMeaning
1EnglishFishThe constellation and zodiacal sign Pisces
2Old Englishfiscianto fish
3Proto-West Germanicfiskōnto fish, to catch fish
4Proto-Germanicfiskōnąto fish, to catch fish
5Proto-Germanic-ōnąCreates denominative verbs from nouns; Creates...
6Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
7Proto-Indo-European-yétiCreates intransitive, often deponent,...
8Proto-Indo-Europeanyé-
9Chichewaiyehe, she

via English sweet

StepLanguageWordMeaning
1EnglishsweetHaving a pleasant taste, especially one relating...
2Middle Englishswetesweet, pleasant-tasting; sweet in smell;...
3Old Englishswētesweet
4Proto-West Germanicswōtīsweet
5Proto-Germanicswōtuzsweet
6Proto-Indo-Europeanswéh₂dussweet
7Proto-Indo-Europeansweh₂d-sweet
Every word from Chichewa iye
sweetfish — Etymology, Origin & Word History | Etymology Explorer