Latin vīpera

→ English viper (derived)

→ English wyvern (derived)

→ English weever (derived)

→ Welsh gwiber (borrowed)

→ Esperanto vipuro (derived)

→ Spanish víbora (inherited)

→ Spanish guiverno (derived)

→ French vipère (borrowed)

→ French vouivre (inherited)

→ Old French wivre (inherited)

→ Friulian lipare (inherited)

→ Irish vuibhearn (derived)

→ Galician víbora (inherited)

→ Istriot beîpara (inherited)

→ Italian vipera (inherited)

→ Old Spanish biuora (mention)

→ Portuguese víbora (inherited)

→ Romanian viperă (inherited)

→ Aromanian vipirã (inherited)

→ Aromanian nvipiredz (derived)

→ Venetian vìpara (inherited)