Old Irish ferr

← Proto-Celtic *werros (inherited)

← Old Church Slavonic врьхъ (cognate)

← Proto-Indo-European *wers- (inherited)

← Latin verrūca (cognate)

← Lithuanian viršùs (cognate)

→ Irish fara (inherited)

→ Irish fearr (inherited)

→ Scottish Gaelic feàrr (inherited)

→ Latin verruca (cognate)

→ Latvian virsa (cognate)