Where does “ручкӕ” come from?

ручкӕ (Ossetian) comes from Russian ру́чка, from Russian рука́, from Old East Slavic рѫка, from Proto-Slavic rǫka, from Proto-Balto-Slavic ránkāˀ, from Proto-Indo-European wrenk-, from Latvian wer- — to turn, to bend.

ручкӕ (Ossetian): pen

Definitions

Ancestry of “ручкӕ”, step by step

Step	Language	Word	Meaning
1	Russian	ру́чка	small hand
2	Russian	рука́	arm, hand; hand
3	Old East Slavic	рѫка	—
4	Proto-Slavic	rǫka	hand; arm
5	Proto-Balto-Slavic	ránkāˀ	hand, arm
6	Proto-Indo-European	wrenk-	to turn, twist, bend
7	Latvian	wer-	to turn, to bend

Every word from Latvian wer- →Every word from Proto-Indo-European wrenk- →Every word from Proto-Balto-Slavic ránkāˀ →