←
North Frisian serk (cognate)
←
Proto-Germanic *sarkiz (inherited)
←
Old Swedish særker (inherited)
←
Proto-Indo-European *swerg- (derived)
←
Proto-Indo-European *swerk- (mention)
←
Proto-Indo-European *ser- (derived)
←
Old Norse serkr (inherited)
→
Estonian särk (cognate)