Where does “Herztätigkeit” come from?

Herztätigkeit (German) comes from German Tätigkeit, from German tätig, 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.

Herztätigkeit (German): heart activity, heart function

Definitions

  1. heart activity, heart function

Ancestry of “Herztätigkeit”, step by step

Herztätigkeit traces back through two separate lines of ancestry.

via German Tätigkeit

StepLanguageWordMeaning
1GermanTätigkeitactivity; job
2Germantätigactive
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 herz

StepLanguageWordMeaning
1Germanherzsingular imperative of herzen; first-person...
2German-los-less
3Old Dutch-lōs
4Proto-West Germanic*-lauswithout, -less
5Proto-Germanic-lausaz-less, lacking, devoid of
6Proto-Germaniclausazloose, free; empty, devoid; false, untrue
7Proto-Indo-EuropeanlewH-louse
Every word from Proto-Indo-European yeh₁r-Every word from German -igEvery word from Proto-Germanic jērą