Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English fluctuation
English fluctuate (suffix)
English ion (suffix)
Proto-Indo-European *-tus (root)
Latin fluctuatiōnem (borrowed)
Latin fluctuatiō (mention)
Latin fluctuō (mention)
Latin fluctus (mention)

English fluctuational (suffix)
English refluctuation (prefix)
English trifluctuation (prefix)
English microfluctuation (prefix)
English cofluctuation (prefix)