Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Finnish
ruko
←
Estonian
ruga
(cognate)
←
Proto-Germanic
<!-- *hrūgō- -->
(derived)
←
Proto-Germanic
<!-- *hruka- -->
(derived)
←
Icelandic
hrúga
(cognate)
←
Karelian
ruko
(cognate)
←
Old Norse
hroki
(cognate)
→
Finnish
heinäruko
(affix)