Russian перст

← Old Church Slavonic прьстъ (borrowed)

← Proto-Slavic *pьrstъ (derived)

→ Latvian pirksts (mention)

→ Russian перчатка (mention)

→ Russian напёрсток (affix)

→ Russian двоеперстие (affix)

→ Russian двуперстие (affix)

→ Russian троеперстие (affix)

→ Russian наперстянка (affix)