Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Plautdietsch
Donst
←
Proto-Germanic
*dunstą
(inherited)
←
Middle Low German
dunst
(inherited)
←
Old Saxon
*dunst
(inherited)