Where does “orrszarvam” come from?

orrszarvam (Hungarian) comes from Hungarian orrszarv, from Hungarian szarv, from Proto-Finno-Ugric śarwe, from Proto-Indo-Iranian *ćr̥Hwás, from Proto-Indo-European ḱr̥h₂-wó-s, from Proto-Indo-European ḱerh₂- — head, top; horn.

Ancestry of “orrszarvam”, step by step

Step	Language	Word	Meaning
1	Hungarian	orrszarv	rhino horn
2	Hungarian	szarv	horn
3	Proto-Finno-Ugric	śarwe	—
4	Proto-Indo-Iranian	*ćr̥Hwás	horn
5	Proto-Indo-European	ḱr̥h₂-wó-s	—
6	Proto-Indo-European	ḱerh₂-	head, top; horn

Every word from Proto-Indo-European ḱerh₂- →Every word from Proto-Indo-European ḱr̥h₂-wó-s →Every word from Proto-Indo-Iranian *ćr̥Hwás →