Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
kéng
←
German
kühn
(cognate)
←
English
keen
(cognate)
←
Proto-Germanic
*kōniz
(inherited)
←
Old High German
kuoni
(inherited)
←
Icelandic
kænn
(cognate)
←
Dutch
koen
(cognate)