Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
bak
←
Proto-Germanic
*baką
(inherited)
←
Old Norse
bak
(inherited)
→
Icelandic
baka
(mention)
→
Icelandic
bakpoki
(mention)
→
Icelandic
skjaldbaka
(compound)
→
Icelandic
ber er hver að baki, nema sér bróður eigi
(mention)
→
Icelandic
bakuggi
(compound)
→
Icelandic
baks
(mention)
→
Icelandic
bakskaut
(prefix)
→
Icelandic
bakvörður
(compound)
→
Icelandic
bakgrunnur
(affix)
→
Dutch
bak
(cognate)