Where does “finned” come from?

I need to flag a significant problem with this chain before writing. The chain provided contains logical inconsistencies that make it impossible to write an accurate etymology: 1. **Broken linguistic path**: English "fin" cannot reasonably derive from Old English "-od" (a suffix), which cannot derive from Latin "finis" (meaning "end/boundary"), which cannot derive from Proto-Indo-European "dʰeygʷ-" 2. **Repeated roots**: Proto-Indo-European "dʰeygʷ-" appears four times identically with no intermediate steps, which is linguistically implausible 3. **Yiddish insertion**: Yiddish "פֿינף" (finf, meaning "five") appears in the chain but has no semantic connection to "fin" (a fish appendage) and doesn't fit the proposed etymology 4. **Unknown meaning**: The meaning

finned (English): Having fins; simple past tense and past...

Definitions

  1. Having fins; simple past tense and past...

Ancestry of “finned”, step by step

StepLanguageWordMeaning
1EnglishfinOne of the appendages of a fish, used to propel...
2EnglishfinasterideA medication used to treat male pattern baldness and benign prostatic hyperplasia in males
3English-sterideUsed to form names of [[w:5α-reductase
4English-ideAny of a group of related compounds - azide,...
5Middle French-ideid (dynast)
6Latin-issuffixed to the root of nouns in composition,...
7Latin-asuffixed to the roots of verbs, forms agent...
8Proto-ItalicForms masculine agent nouns from prefixed or compounded bases
9Proto-Indo-European-éh₂

Words derived from “finned

Every word from Proto-Indo-European -éh₂