Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
stúfr
←
Proto-Germanic
*stūfaz
(inherited)
→
Westrobothnian
stuf
(inherited)
→
Ancient Greek
στύπος
(cognate)
→
Icelandic
stýfa
(mention)