Where does “Diffusionsgeschwindigkeit” come from?

Diffusionsgeschwindigkeit (German) comes from German Geschwindigkeit, from German -igkeit, from German -ig, from German -jährig, from German Jahr, from Middle High German jār, from Old High German jār, from Proto-West Germanic jār — year.

Diffusionsgeschwindigkeit (German): diffusion rate

Definitions

  1. diffusion rate

Ancestry of “Diffusionsgeschwindigkeit”, step by step

Diffusionsgeschwindigkeit traces back through two separate lines of ancestry.

via German Geschwindigkeit

StepLanguageWordMeaning
1GermanGeschwindigkeitspeed, pace, tempo, velocity, rate
2German-igkeitforms nouns from adjectives
3German-ig-y; forms adjectives from nouns; forms adjectives...
4German-jährigyears old; years lasting
5GermanJahryear
6Middle High Germanjāryear
7Old High Germanjāryear
8Proto-West Germanicjāryear
9Proto-Germanicjērąyear; name of the J-rune
10Proto-Indo-Europeanyeh₁r-year

via German Diffusion

StepLanguageWordMeaning
1GermanDiffusiondiffusion (physics: the intermingling of the molecules of a fluid due to random thermal agitation)
2Latindiffusiospreading out, increase in extent or breadth
3Latindiffundōto diffuse, scatter
4Latinfundōto pour out, shed
5Latinfundusbottom; farm; piece of land; estate; ground
6Proto-Indo-Europeanbʰudʰmḗnbottom
7Proto-Indo-Europeandʰewbʰ-deep
8Proto-Indo-Europeandʰewh₂-smoke; mist, haze
Every word from Proto-Indo-European yeh₁r-