Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
waarm
←
Proto-Germanic
*warmaz
(inherited)
←
Old High German
warm
(inherited)
←
Hunsrik
waarem
(cognate)