Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
German
Untergrund
←
German
unter
(prefix)
←
German
Grund
(prefix)
→
English
underground
(cognate)
→
German
Untergrundbahn
(affix)
→
Dutch
ondergrond
(cognate)