Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
ëm-
←
German
um-
(cognate)
←
English
um-
(cognate)
←
Proto-Germanic
*umbi
(derived)
←
Old High German
umbi
(derived)
←
Luxembourgish
ëm
(mention)
←
Dutch
om-
(cognate)
→
Luxembourgish
ëmbréngen
(affix)
→
Luxembourgish
erëmgewannen
(affix)
→
Luxembourgish
ëmdoen
(affix)
→
Luxembourgish
ëmsetzen
(affix)
→
Luxembourgish
ëmleeën
(affix)
→
Luxembourgish
ëmänneren
(affix)
→
Luxembourgish
ëmdréien
(affix)