Where does “подраться” come from?

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

подраться (Russian): to fight, to scuffle; passive of подра́ть

Definitions

to fight, to scuffle; passive of подра́ть

Ancestry of “подраться”, step by step

Step	Language	Word	Meaning
1	Russian	дра́ться	to fight, to scuffle
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 →