Where does “eyeshine” come from?

eyeshine (English) comes from English Eye, from English -some, from Middle English -som, from Old English sum, from Proto-West Germanic *sum, from Proto-Germanic sumaz, from Proto-Indo-European sem- — together, one.

eyeshine (English): A visible effect of the tapetum lucidum, causing...

Definitions

  1. A visible effect of the tapetum lucidum, causing...

Ancestry of “eyeshine”, step by step

eyeshine traces back through two separate lines of ancestry.

via English Eye

StepLanguageWordMeaning
1EnglishEyeA place name
2English-someCharacterized by some specific condition or...
3Middle English-somsome; having a specific quality
4Old Englishsumsome
5Proto-West Germanic*sumsome
6Proto-Germanicsumazsome (one), a certain (one)
7Proto-Indo-Europeansem-together, one

via English shine

StepLanguageWordMeaning
1EnglishshineTo emit light; To reflect light; To distinguish...
2Middle EnglishshinenAlternative form of schinen
3Old Englishsċīnanto shine
4Proto-West Germanicskīnanto shine; to appear
5Proto-Germanicskīnanąto shine; to appear
6Proto-Indo-European(s)ḱeh₁y-to shine, shimmer
Every word from Proto-Indo-European sem-Every word from Proto-Germanic sumazEvery word from Proto-West Germanic *sum