Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
ronderëm
←
German
rundherum
(cognate)
←
Luxembourgish
ronn
(affix)
←
Luxembourgish
erëm
(affix)