Where does “unicornfish” come from?

unicornfish (English) comes from English unicorn, from Middle English unicorne, from Anglo-Norman unicorne, from Latin ūnicornis, from Latin ūni-, from Latin ūnus, from Old Latin oinos, from Proto-Italic oinos — one; single.

unicornfish (English): Any fish of the genus Naso; The fish Eumecichthys...

Definitions

  1. Any fish of the genus Naso; The fish Eumecichthys...

Ancestry of “unicornfish”, step by step

unicornfish traces back through two separate lines of ancestry.

via English unicorn

StepLanguageWordMeaning
1EnglishunicornA mythical beast resembling a horse or deer with...
2Middle Englishunicorneunicorn; Any one-horned beast; anger, rage, fury,...
3Anglo-Normanunicorneunicorn
4LatinūnicornisOne-horned
5Latinūni-one; uni
6Latinūnusone, single
7Old Latinoinosone
8Proto-Italicoinoscardinal number 1 Previous: n/a Next: *duō;...
9Proto-Indo-Europeanóynosone; single

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
Every word from Proto-Indo-European óynos