Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Gaascht
←
Danish
gæst
(cognate)
←
German
Gast
(cognate)
←
English
guest
(cognate)
←
Proto-Germanic
*gastiz
(inherited)
←
Old High German
gast
(inherited)
←
Icelandic
gestur
(cognate)
←
Dutch
gast
(cognate)
→
Luxembourgish
Éieregaascht
(affix)