Where does “поодиночке” come from?

поодиночке (Russian) comes from Russian одиночка, from Russian одино́кий, from Russian оди́н, from Old East Slavic оди́нъ, from Proto-Slavic edìnъ, from Proto-Balto-Slavic edīˀnas, from Proto-Balto-Slavic aiˀnas, from Proto-Indo-European óynos — one; single.

поодиночке (Russian): singly, one by one, one at a time

Definitions

singly, one by one, one at a time

Ancestry of “поодиночке”, step by step

поодиночке traces back through two separate lines of ancestry.

via Russian одиночка

Step	Language	Word	Meaning
1	Russian	одиночка	loner, singleton one who lacks or avoids company
2	Russian	одино́кий	solitary, single, lone
3	Russian	оди́н	—
4	Old East Slavic	оди́нъ	—
5	Proto-Slavic	edìnъ	one
6	Proto-Balto-Slavic	edīˀnas	—
7	Proto-Balto-Slavic	aiˀnas	one
8	Proto-Indo-European	óynos	one; single

via Russian ПО

Step	Language	Word	Meaning
1	Russian	ПО	software
2	Old East Slavic	по	on, along, by
3	Proto-Slavic	po	after; by; at
4	Proto-Indo-European	h₂pó	off, away
5	Proto-Indo-European	h₂epo	from, off, back; off, away; off, from

Every word from Proto-Indo-European óynos →Every word from Proto-Balto-Slavic aiˀnas →Every word from Proto-Balto-Slavic edīˀnas →