Proto-Slavic *perti

→ Bulgarian пряпор (cognate)

→ Bulgarian преперец (cognate)

→ Old Church Slavonic опрѣти (inherited)

→ Old Church Slavonic прѣти (inherited)

→ Polish przeć (inherited)

→ Polish wyprzeć (derived)

→ Romanian zăpor (mention)

→ Russian соперник (mention)

→ Russian переть (inherited)

→ Russian -пирать (mention)

→ Serbo-Croatian perut (derived)

→ Serbo-Croatian перут (derived)

→ Slovene zapreti (inherited)

→ Ukrainian суперник (mention)