Proto-Slavic *śěrъ

→ Belarusian шэры (derived)

→ Bulgarian сяр (derived)

→ Lower Sorbian šery (inherited)

→ Ancient Greek κιρρός (cognate)

→ Lithuanian širmas (cognate)

→ Polish szary (inherited)

→ Russian серый (inherited)

→ Ukrainian сірий (inherited)

→ Old Armenian ցիռ (cognate)

→ Old Novgorodian хѣрь (inherited)