Where does “pátniH” come from?

pátniH (Proto-Indo-Aryan) comes from Proto-Indo-Iranian pátniH, from Proto-Indo-European pótnih₂, from Proto-Indo-European pótis, from Proto-Indo-European ph₃tis, from Proto-Indo-European peh₃- — to drink.

Ancestry of “pátniH”, step by step

StepLanguageWordMeaning
1Proto-Indo-IranianpátniHwife
2Proto-Indo-Europeanpótnih₂wife
3Proto-Indo-Europeanpótismaster, ruler; husband
4Proto-Indo-Europeanph₃tis—
5Proto-Indo-Europeanpeh₃-to drink
Every word from Proto-Indo-European peh₃- →Every word from Proto-Indo-European ph₃tis →Every word from Proto-Indo-European pótis →