Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Finnish
aro
←
Estonian
aru
(cognate)
←
Proto-Finnic
*aro
(inherited)
←
Erzya
аразь
(cognate)
→
Finnish
arovuokko
(compound)
→
Finnish
arokotka
(compound)
→
Finnish
aromuurahaiskäpy
(compound)
→
Finnish
arokissa
(compound)
→
Finnish
pensasaro
(compound)
→
Finnish
arotundra
(compound)
→
Finnish
arohilleri
(compound)
→
Finnish
arokettu
(affix)
→
Finnish
aroseepra
(affix)
→
Finnish
Arola
(suffix)
→
Finnish
arojuoksija
(compound)
→
Finnish
heinäaro
(compound)
→
Finnish
aromurmeli
(affix)
→
Finnish
arolukki
(compound)
→
Finnish
arokakadu
(compound)
→
Finnish
aroharmaalokki
(affix)
→
Finnish
aroeläin
(affix)
→
Finnish
arokasvi
(affix)
→
Finnish
arovyöhyke
(affix)