Where does “ultragreen” come from?

ultragreen (English) comes from English Green, from Middle English grene, from Old English grēne, from Proto-West Germanic grōnī, from Proto-Germanic grōniz, from Proto-Indo-European ǵʰreh₁- — to become green, grow; to grow; to green, to grow.

ultragreen (English): Of a very vivid green colour; Taking a great deal...

Definitions

  1. Of a very vivid green colour; Taking a great deal...

Ancestry of “ultragreen”, step by step

ultragreen traces back through two separate lines of ancestry.

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 ultra

StepLanguageWordMeaning
1EnglishultraExtreme; far beyond the norm; fanatical;...
2Latinultrābeyond
3Latin-asuffixed to the roots of verbs, forms agent...
4Proto-Italic-āForms masculine agent nouns from prefixed or compounded bases
5Proto-Indo-European-éh₂—
Every word from Proto-Indo-European ǵʰreh₁- →Every word from Proto-Germanic grōniz →Every word from Proto-West Germanic grōnī →