Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
käichen
←
German
keuchen
(cognate)
←
English
cough
(cognate)
←
Middle High German
kīchen
(inherited)
←
Dutch
kuchen
(cognate)