Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Catalan lluitar
← Proto-Indo-European *lewg- (mention)
← Latin luctārī (inherited)
← Latin luctor (mention)

→ Catalan lluitador (suffix)
→ Spanish luchar (cognate)
→ French lutter (cognate)
→ Occitan luchar (cognate)
→ Portuguese lutar (cognate)