Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
þinga
←
Proto-Germanic
*þingōną
(inherited)
←
Proto-Germanic
*þingą
(mention)
←
Old Norse
þinga
(inherited)