Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Alemannic German
aagaa
←
German
angehen
(cognate)
←
Alemannic German
aa
(prefix)
←
Alemannic German
gaa
(prefix)
←
Dutch
aangaan
(cognate)