Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
rúmur
←
Proto-Germanic
*rūmaz
(derived)
←
Old Norse
rúmr
(derived)
→
English
room
(cognate)