Russian

Noun

бирю́к • ‎(birjúk) m anim ‎(genitive бирюка́, nominative plural бирюки́, genitive plural бирюко́в)

1. lone wolf, loner, unsociable person

Declension

References

1. ↑ “*bȫrü.” in Sergei Starostin, Vladimir Dybo, Oleg Mudrak (2003), Etymological Dictionary of the Altaic Languages, Leiden: Brill Academic Publishers.