Where does “undercolour” come from?

undercolour (English) comes from English colour, from Middle English colour, from Anglo-Norman colur, from Old French colour, from Latin color, from Ancient Greek μέτρον, from Ancient Greek -τρον, from Proto-Hellenic -tron — Derives agent nouns from verbs, denoting someone...

undercolour (English): A colour used as a base and then coloured over,...

Definitions

  1. A colour used as a base and then coloured over,...

Ancestry of “undercolour”, step by step

undercolour traces back through two separate lines of ancestry.

via English colour

StepLanguageWordMeaning
1EnglishcolourAustralia, Canada, Ireland, New Zealand, South...
2Middle Englishcolourcolour, hue, shade; pigment, dye; method
3Anglo-NormancolurAlternative form of color
4Old FrenchcolourAlternative form of color
5Latincolorcolour, shade; color; pigment; complexion
6Ancient Greekμέτρονsomething used to measure: measure, rule, weight;...
7Ancient Greek-τρονForms instrument nouns
8Proto-Hellenic-tronForms instrument nouns from verb stems
9Proto-Indo-European-tromForms nouns denoting a tool or instrument
10Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...

via English under

StepLanguageWordMeaning
1EnglishunderIn or at a lower level than; As a subject of;...
2Middle Englishunderunder
3Old Englishunderunder, beneath
4Proto-Germanicunderamong, between; under, beneath; under
5Proto-Indo-Europeanh₁entérbetween
6Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European -tḗr