Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
rúm
←
Proto-Germanic
*rūmą
(derived)
←
Proto-Indo-European
*rowǝ-
(derived)
←
Old Norse
rúm
(derived)
→
Icelandic
rúmföt
(affix)
→
Icelandic
rúmteppi
(affix)
→
Icelandic
rúmfræði
(affix)
→
Icelandic
rúmgóður
(compound)
→
Icelandic
barnarúm
(affix)
→
Icelandic
rúmmetri
(compound)
→
Icelandic
rúmsentimetri
(affix)