Where does “ھەم” come from?

ھەم (Uyghur) comes from Chagatai هم, from Classical Persian هم, from Pahlavi hm, from Old Persian 𐏃𐎶, from Proto-Iranian hamHás, from Proto-Indo-Iranian samHás, from Proto-Indo-European somHós, from Proto-Indo-European sem- — together, one.

ھەم (Uyghur): and; also

Definitions

and; also

Ancestry of “ھەم”, step by step

Step	Language	Word	Meaning
1	Chagatai	هم	both... and
2	Classical Persian	هم	—
3	Pahlavi	hm	—
4	Old Persian	𐏃𐎶	same, together
5	Proto-Iranian	hamHás	—
6	Proto-Indo-Iranian	samHás	same, equal
7	Proto-Indo-European	somHós	same, alike
8	Proto-Indo-European	sem-	together, one

Every word from Proto-Indo-European sem- →Every word from Proto-Indo-European somHós →Every word from Proto-Indo-Iranian samHás →