Where does “подоить” come from?

подоить (Russian) comes from Russian доить, from Old East Slavic доити, from Proto-Slavic dojiti, from Proto-Indo-European dʰeh₁(y)- — to suckle, nurse.

подоить (Russian): to milk

Definitions

to milk

Ancestry of “подоить”, step by step

Step	Language	Word	Meaning
1	Russian	доить	to milk; to give a handjob
2	Old East Slavic	доити	—
3	Proto-Slavic	dojiti	to give milk; to milk
4	Proto-Indo-European	dʰeh₁(y)-	to suckle, nurse

Every word from Proto-Indo-European dʰeh₁(y)- →Every word from Proto-Slavic dojiti →Every word from Old East Slavic доити →