Where does “*rǫčьnikъ” come from?

*rǫčьnikъ (Proto-Slavic) comes from Proto-Slavic rǫka, from Proto-Balto-Slavic ránkāˀ, from Proto-Indo-European wrenk-, from Latvian wer- — to turn, to bend.

Ancestry of “*rǫčьnikъ”, step by step

StepLanguageWordMeaning
1Proto-Slavicrǫkahand; arm
2Proto-Balto-Slavicránkāˀhand, arm
3Proto-Indo-Europeanwrenk-to turn, twist, bend
4Latvianwer-to turn, to bend
Every word from Latvian wer- →Every word from Proto-Indo-European wrenk- →Every word from Proto-Balto-Slavic ránkāˀ →