From Wiktionary, the free dictionary
Resultant noun from съ́рдя се (sǎ́rdja se, “to sulk, to be upset”) + -ня́ (-njá)
сръдня́ • (srǎdnjá) f
- act of sulking, annoyance, despisal
- “сръдня”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
- “сръдня”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010