Proto-Germanic *wirkijaną

→ English bework (mention)

→ Afrikaans werk (inherited)

→ German wirken (inherited)

→ Middle Dutch werken (inherited)

→ Luxembourgish wierken (inherited)

→ Dutch werken (inherited)

→ Old Dutch wirken (inherited)

→ Old Frisian wurkje (inherited(ofs/fy))

→ Swedish virka (derived)