 One of the most famous borrowings is the Finnish word "kuningas" "king" (< Proto-Finnic "*kuningas"), which was borrowed from Proto-Germanic "*kuningaz".Finnish has been very conservative in retaining the basic structure of the borrowed word, nearly preserving the nominative singular case marker reconstructed for Proto-Germanic masculine 'a'-stems.Furthermore, the Proto-Germanic "*-az" ending corresponds exactly to the "*-os" ending reconstructable for Proto-Indo-European masculine "o"-stems.