From Wiktionary, the free dictionary
Inherited from Proto-Slavic *jętry (v-stem).
етъ́рва • (etǎ́rva) f (relational adjective етъ́рвин)
- husband's brother's wife
- “етърва”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
- “етърва”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010