Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Estonian
kaup
←
German
Kauf
(cognate)
←
Finnish
kauppa
(cognate)
←
Proto-Germanic
*kaupaz
(derived)
←
Ingrian
kauppa
(cognate)
←
Ludian
kaup
(cognate)
←
Old Norse
kaup
(cognate)
←
Livvi
kauppu
(cognate)
←
Votic
kauppa
(cognate)
→
Estonian
kaubamärk
(compound)
→
Estonian
kauplema
(suffix)