Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
gíga-
←
Ancient Greek
γίγας
(derived)
→
Icelandic
gígabæti
(affix)
→
Icelandic
gígalítri
(affix)