Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
dach
←
German
doch
(cognate)
←
English
though
(cognate)
←
Proto-Germanic
*þauh
(inherited)
←
Middle High German
doch
(inherited)
←
Proto-West Germanic
*þauh
(inherited)
←
Old High German
doh
(inherited)
←
Icelandic
þó
(cognate)
←
Dutch
doch
(cognate)