Where does “Röntgenpraxis” come from?

Röntgenpraxis (German) comes from German Praxis, from Latin praxis, from Ancient Greek πρᾶξις, from Ancient Greek πρᾱ́σσω, from Proto-Indo-European per(h₂)-.

Röntgenpraxis (German): X-ray practice

Definitions

X-ray practice

Ancestry of “Röntgenpraxis”, step by step

Röntgenpraxis traces back through two separate lines of ancestry.

via German Praxis

Step	Language	Word	Meaning
1	German	Praxis	practice, experience
2	Latin	praxis	practice, method, practical experience
3	Ancient Greek	πρᾶξις	deed, act, action, activity; business dealing;...
4	Ancient Greek	πρᾱ́σσω	I do, practice; to do
5	Proto-Indo-European	per(h₂)-	—

via German röntgen

Step	Language	Word	Meaning
1	German	röntgen	to X-ray
2	German	Röntgen	röntgen, X-ray

Every word from Proto-Indo-European per(h₂)- →Every word from Ancient Greek πρᾱ́σσω →Every word from Ancient Greek πρᾶξις →