Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
German
Achteck
←
German
acht
(compound)
←
German
Ecke
(compound)
→
German
achteckig
(suffix)
→
German
Achteckpyramide
(affix)