Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
pentad
←
English
pent
(confix)
←
English
ad
(confix)
←
Ancient Greek
πεντάς
(derived)
→
English
pentadic
(suffix)