Where does “qelem” come from?

qelem (Zazaki) comes from Arabic قلم, from Ancient Greek κάλαμος, from Proto-Indo-European ḱolh₂-m-, from Proto-Indo-European kolH- — to raise, to lift, to build; awn.

Ancestry of “qelem”, step by step

Step	Language	Word	Meaning
1	Arabic	قلم	to cut, to clip, to pare, to prune, to trim, to...
2	Ancient Greek	κάλαμος	a reed; anything made of reed or cane;...
3	Proto-Indo-European	ḱolh₂-m-	—
4	Proto-Indo-European	kolH-	to raise, to lift, to build; awn

Every word from Proto-Indo-European kolH- →Every word from Proto-Indo-European ḱolh₂-m- →Every word from Ancient Greek κάλαμος →