Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
heptad
←
English
hepta
(confix)
←
English
ad
(confix)
→
English
heptadic
(suffix)
→
English
heptade
(mention)