Where does “vencäissä” come from?

vencäissä (Ingrian) comes from Russian венчаться, from Russian -ся, from Old East Slavic сѧ, from Proto-Slavic sę, from Proto-Balto-Slavic *sen, from Proto-Indo-European swé — self.

vencäissä (Ingrian): to get married

Definitions

to get married

Ancestry of “vencäissä”, step by step

Step	Language	Word	Meaning
1	Russian	венчаться	to be crowned; passive of венча́ть; to be married...
2	Russian	-ся	Reflexive suffix appended to finite verbs and...
3	Old East Slavic	сѧ	—
4	Proto-Slavic	sę	oneself: myself, yourself, himself, herself,...
5	Proto-Balto-Slavic	*sen	oneself
6	Proto-Indo-European	swé	self

Every word from Proto-Indo-European swé →Every word from Russian -ся →Every word from Proto-Balto-Slavic *sen →