Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
eelef
←
Middle High German
eilef
(inherited)
←
Old High German
einlif
(inherited)
→
Alemannic German
eintlef
(cognate)