Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Spanish paja
Proto-Indo-European *pel- (derived)
Latin palea (inherited)
Old Spanish paxa (inherited)

Catalan palla (cognate)
Spanish pajilla (suffix)
Spanish pajero (suffix)
Spanish pajita (suffix)
Spanish pajear (affix)
Spanish pajizo (suffix)
Spanish pajoso (suffix)
Friulian pae (cognate)
Galician palla (cognate)