Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Brudder
←
Proto-Germanic
*brōþēr
(inherited)
←
Old High German
bruoder
(inherited)
←
Proto-Indo-European
*bʰréh₂tēr
(inherited)
→
Luxembourgish
bridderlech
(suffix)