Where does “Dunkelflaute” come from?

Dunkelflaute (German) comes from German Flaute, from German flau, from Middle Low German flau, from Middle Dutch vlau, from Old French flou, from Frankish hlāo, from Proto-Germanic hlēwaz, from Proto-Indo-European ḱlew- — to cover; to incline.

Dunkelflaute (German): A period of time in which little to no energy can be generated with the use of wind and solar power

Definitions

  1. A period of time in which little to no energy can be generated with the use of wind and solar power

Ancestry of “Dunkelflaute”, step by step

Dunkelflaute traces back through two separate lines of ancestry.

via German Flaute

StepLanguageWordMeaning
1GermanFlautecalm; lull, slack, slack period
2Germanflaucalm, weak, windless; flat, weak; dizzy,...
3Middle Low Germanflau
4Middle Dutchvlau
5Old Frenchfloutired, weary
6Frankishhlāolukewarm, tepid, mild
7Proto-Germanichlēwazlukewarm
8Proto-Indo-Europeanḱlew-to hear
9Proto-Indo-Europeanḱel-to cover; to incline

via German Dünkel

StepLanguageWordMeaning
1GermanDünkelconceit, smugness, arrogance
2Middle High Germantunkel
3Old High Germantunkalīdark, darkness
4Old High German-ness
5Proto-West Germanic-ness, -th
6Proto-Germanic-į̄-th
7Proto-Indo-European-íh₂
8Proto-Indo-European-h₂Creates collective nouns, which refer to groups...
Every word from Proto-Indo-European ḱel-Every word from Proto-Indo-European ḱlew-Every word from Proto-Germanic hlēwaz