Where does “nightblindness” come from?

nightblindness (English) comes from English blindness, from Middle English blyndnes, from Old English blindnes, from Old English blind, from Proto-West Germanic blind, from Proto-Germanic blindaz, from French blindage, from French blinder — to blend, to mix up; to make cloudy, opaque;...

Ancestry of “nightblindness”, step by step

nightblindness traces back through two separate lines of ancestry.

via English blindness

StepLanguageWordMeaning
1EnglishblindnessThe condition of being blind; unable to see; Want...
2Middle Englishblyndnes
3Old Englishblindnesblindness, inability to see because of darkness;...
4Old Englishblindblind; a blind person
5Proto-West Germanicblindblind
6Proto-Germanicblindazblind
7Frenchblindagearmour, armour plating
8Frenchblinderto armor; to reinforce
9Frenchblindepieces of wood used as cover or protection;...
10Germanblendeinflection of blenden: ## first-person singular...
11Germanblendento dazzle; to blind; to show off; to pose; to...
12Middle High Germanblendento blend, mix
13Old High Germanblenten
14Proto-Germanicblandijanąto blind
15Proto-Indo-Europeanbʰlendʰ-to blend, to mix up; to make cloudy, opaque;...

via English night

StepLanguageWordMeaning
1EnglishnightThe period between sunset and sunrise, when a...
2Middle EnglishnyghtAlternative form of nighte; Alternative form of...
3Middle Englishnightenight
4Old EnglishnyhtAlternative form of niht
5Proto-West Germanicnahtnight
6Proto-Germanicnahtsnight
7Proto-Indo-Europeannókʷtsnight
8Proto-Indo-Europeannegʷ-bare, naked
Every word from Proto-Indo-European bʰlendʰ-