Proto-Slavic *terba

→ Czech třeba (inherited)

→ Old Church Slavonic трѣба (inherited)

→ Polish trzeba (inherited)

→ Romanian treabă (derived)

→ Romanian trebnic (derived)

→ Russian требовать (mention)

→ Russian треба (derived)

→ Serbo-Croatian treba (inherited)

→ Slovak treba (inherited)

→ Ukrainian потреба (inherited)

→ Ukrainian треба (inherited)