Where does “seelenkundlich” come from?

seelenkundlich (German) comes from German Seelenkunde, from German seele, from Middle High German sēle, from Old High German sēla, from Proto-West Germanic saiwalu, from Proto-Germanic saiwalō, from Proto-Germanic saiwiz, from Proto-Germanic sīhwaną — to be wet; dribble; run; to stretch one's arm;...

Ancestry of “seelenkundlich”, step by step

StepLanguageWordMeaning
1GermanSeelenkunde
2Germanseelesoul
3Middle High Germansēlesoul
4Old High Germansēlasoul
5Proto-West Germanicsaiwalusoul
6Proto-Germanicsaiwalōsoul, life force
7Proto-Germanicsaiwizsea, ocean
8Proto-Germanicsīhwanąto filter
9Proto-Indo-Europeanseykʷ-to moisten; to filter
10Proto-Indo-Europeansey-to be wet; dribble; run; to stretch one's arm;...
Every word from Proto-Indo-European sey-