Where does “green-eyed monster” come from?

green-eyed monster (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.

green-eyed monster (English): Envy, jealousy, covetousness

Definitions

  1. Envy, jealousy, covetousness

Ancestry of “green-eyed monster”, step by step

green-eyed monster traces back through 3 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 Green

StepLanguageWordMeaning
1EnglishGreenOf, or pertaining, to a Green Party or green...
2Middle Englishgrenegreen
3Old Englishgrēnegreen
4Proto-West Germanicgrōnīgreen
5Proto-Germanicgrōnizgreen
6Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow

via English monster

StepLanguageWordMeaning
1EnglishmonsterA terrifying and dangerous creature; A bizarre or...
2Middle EnglishmonstreA monster or beast; a horrific or frightening...
3Old Frenchmonstremonster
4Latinmōnstruma divine omen indicating misfortune, an evil omen, portent
5Proto-Italicmonestrom
Every word from Proto-Indo-European sem-Every word from Proto-Germanic sumazEvery word from Proto-West Germanic *sum