Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
heptamerous
←
English
-
(cognate)
←
English
hepta
(confix)
←
English
merous
(confix)
←
Ancient Greek
ἑπταμερής
(cognate)