Proto-Slavic *studenъ

→ Bulgarian студен (inherited)

→ Czech studený (inherited)

→ Old Church Slavonic стоуденъ (inherited)

→ Old Church Slavonic студеньць (mention)

→ Macedonian студен (inherited)

→ Russian студёный (inherited)

→ Russian стужа (derived)

→ Russian студенец (mention)

→ Russian студить (cognate)

→ Serbo-Croatian studen (inherited)