Where does “Bodenfrost” come from?

Bodenfrost (German) comes from German boden, from Middle High German boden, from Old High German bodam, from Proto-Germanic butmaz, from Proto-Indo-European bʰudʰmḗn, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Bodenfrost (German): temperatures below 0°C measured directly over the ground, rather than at the standard measuring height (which is at least 1.25 metres, in Germany officially 2 metres)

Definitions

  1. temperatures below 0°C measured directly over the ground, rather than at the standard measuring height (which is at least 1.25 metres, in Germany officially 2 metres)

Ancestry of “Bodenfrost”, step by step

Bodenfrost traces back through two separate lines of ancestry.

via German boden

StepLanguageWordMeaning
1Germanbodenground, soil
2Middle High Germanboden
3Old High Germanbodamground, floor; floor, bottom
4Proto-Germanicbutmazbottom; foundation; ground; abyss
5Proto-Indo-Europeanbʰudʰmḗnbottom
6Proto-Indo-Europeandʰewbʰ-deep
7Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via German frost

StepLanguageWordMeaning
1Germanfrostfrost; freezing weather weather conditions below 0 °C
2Middle High Germanvrost
3Old High Germanfrostfrost
4Proto-West Germanic*frost
5Proto-Germanicfrustazcold; frost; freezing weather; frost; rime
6Proto-Indo-Europeanprustósfrost
Every word from Proto-Indo-European dʰewh₂-Every word from Proto-Indo-European dʰewbʰ-Every word from Proto-Indo-European bʰudʰmḗn