Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
inngangur
←
Proto-Germanic
*inngangaz
(inherited)
←
Old Norse
inngangr
(inherited)
→
Icelandic
aðalinngangur
(affix)
→
Luxembourgish
Agang
(cognate)