Where does “plainfin” come from?

plainfin (English) comes from English fin, from English finasteride, from English -steride, from English -ide, from Middle French -ide, from Latin -is, from Latin -a, from Proto-Italic -ā.

plainfin (English): Used to describe various creatures with plain fins

Definitions

  1. Used to describe various creatures with plain fins

Ancestry of “plainfin”, step by step

plainfin traces back through two separate lines of ancestry.

via English fin

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

via English plain

StepLanguageWordMeaning
1EnglishplainFlat, level; Simple; Obvious
2Middle Englishpleynclear; unambiguous
3Anglo-NormanpleynAlternative form of plein
4Old Frenchplayn
5Old Frenchplainfull; plain; flat
6Latinplēnusfull; filled; complete
7Proto-Italicplēnosfull
8Proto-Indo-Europeanpl̥h₁nósfull
9Proto-Indo-Europeanpleh₁-to fill
Every word from Proto-Indo-European -éh₂Every word from Latin -isEvery word from Latin -a
plainfin — Etymology, Origin & Word History | Etymology Explorer