Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Dutch
Aa
←
German
Aa
(cognate)
←
English
ea
(cognate)
←
Proto-Germanic
*ahwō
(inherited)
←
Old High German
aha
(cognate)
←
Proto-Indo-European
*h₂ekʷeh₂
(derived)
←
German Low German
Aa
(cognate)
←
Dutch Low Saxon
Aa
(cognate)
←
Old Saxon
aha
(cognate)