Proto-Slavic *studъ

→ Bulgarian студ (inherited)

→ Czech stud (inherited)

→ Old Church Slavonic стоудъ (inherited)

→ Old Church Slavonic студеньць (mention)

→ Macedonian студен (mention)

→ Macedonian студ (inherited)

→ Russian студёный (mention)

→ Russian стужа (mention)

→ Russian студенец (mention)

→ Serbo-Croatian stud (inherited)

→ Serbo-Croatian студ (inherited)